kie-maven-plugin fails compile If ClassA(in a.jar) which extends ClassB(in b.jar) is used in bpmn2(in c.jar), and dependency for b.jar is not written in c.jar's pom.xml

Issue

In the following situation, maven plugin fails compile:
- There are 2 projects project-a(kie-jar) and project-b(jar)
- project-b depends on spring component
- project-b has a wrapper class, sample.project_b.SpringUtil, which extends a Spring components(org.springframework.context.ApplicationContextAware).
- project-a depends on project-b
- simple-process.bpmn2 in project-a uses sample.project_b.SpringUtil

Error stack trace:

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.kie:kie-maven-plugin:6.0.2-redhat-6:build (default-build) on project project-a: Execution default-build of goal org.kie:kie-maven-plugin:6.0.2-redhat-6:build failed: A required class was missing while executing org.kie:kie-maven-plugin:6.0.2-redhat-6:build: org/springframework/context/ApplicationContextAware
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:224)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:317)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:555)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-build of goal org.kie:kie-maven-plugin:6.0.2-redhat-6:build failed: A required class was missing while executing org.kie:kie-maven-plugin:6.0.2-redhat-6:build: org/springframework/context/ApplicationContextAware
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    ... 19 more
Caused by: org.apache.maven.plugin.PluginContainerException: A required class was missing while executing org.kie:kie-maven-plugin:6.0.2-redhat-6:build: org/springframework/context/ApplicationContextAware
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:130)
    ... 20 more
Caused by: java.lang.NoClassDefFoundError: org/springframework/context/ApplicationContextAware
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:789)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:412)
    at org.drools.core.common.ProjectClassLoader.internalLoadClass(ProjectClassLoader.java:142)
    at org.drools.core.common.ProjectClassLoader.loadClass(ProjectClassLoader.java:125)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at org.drools.core.base.ClassTypeResolver.resolveType(ClassTypeResolver.java:155)
    at org.drools.compiler.rule.builder.dialect.mvel.MVELDialect.addImport(MVELDialect.java:394)
    at org.drools.compiler.compiler.DialectCompiletimeRegistry.addImport(DialectCompiletimeRegistry.java:87)
    at org.drools.compiler.compiler.PackageRegistry.addImport(PackageRegistry.java:93)
    at org.drools.compiler.compiler.PackageBuilder.mergePackage(PackageBuilder.java:1567)
    at org.drools.compiler.compiler.PackageBuilder.addPackage(PackageBuilder.java:962)
    at org.drools.compiler.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:455)
    at org.jbpm.compiler.ProcessBuilderImpl.buildProcess(ProcessBuilderImpl.java:139)
    at org.jbpm.compiler.ProcessBuilderImpl.addProcessFromXml(ProcessBuilderImpl.java:281)
    at org.drools.compiler.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:699)
    at org.drools.compiler.compiler.CompositeKnowledgeBuilderImpl.buildResources(CompositeKnowledgeBuilderImpl.java:149)
    at org.drools.compiler.compiler.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:86)
    at org.drools.compiler.kie.builder.impl.AbstractKieModule.buildKnowledgePackages(AbstractKieModule.java:219)
    at org.drools.compiler.kie.builder.impl.AbstractKieProject.verify(AbstractKieProject.java:39)
    at org.drools.compiler.kie.builder.impl.AbstractKieProject.verify(AbstractKieProject.java:33)
    at org.kie.maven.plugin.BuildMojo.execute(BuildMojo.java:92)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:106)
    ... 20 more
Caused by: java.lang.ClassNotFoundException: org.springframework.context.ApplicationContextAware
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:789)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 52 more