kie-maven-plugin fails to compile when using external dependencies

Issue

• Creating a kjar using the maven plugin (mvn clean package) throws a compile error when trying to import a class from a project dependency even though the class exists in the dependency jar.

[ERROR] Unable to build KieBaseModel:defaultKieBase
Unable to resolve ObjectType 'Person' : [Rule name='Hello']

Rule Compilation error : [Rule name='Hello']
    com/sample/Rule_Hello1775578265.java (7:387) : $p cannot be resolved

Error importing : 'com.sample.Person'

[ERROR] Message [id=1, kieBase=defaultKieBase, level=ERROR, path=Sample.drl, line=7, column=0
   text=Unable to resolve ObjectType 'Person']
[ERROR] Message [id=2, kieBase=defaultKieBase, level=ERROR, path=Sample.drl, line=5, column=0
   text=Rule Compilation error $p cannot be resolved]
[ERROR] Message [id=3, kieBase=defaultKieBase, level=ERROR, path=Sample.drl, line=1, column=0
   text=Error importing : 'com.sample.Person']

[ERROR] Failed to execute goal org.kie:kie-maven-plugin:6.5.0.Final-redhat-2:build (default-build) on project Drools64Ex015_kjar_transitive_dep: Execution default-build of goal org.kie:kie-maven-plugin:6.5.0.Final-redhat-2:build failed: A required class was missing while executing org.kie:kie-maven-plugin:6.5.0.Final-redhat-2:build: org/apache/commons/lang/StringUtils
[ERROR] -----------------------------------------------------
[ERROR] realm =    extension>org.kie:kie-maven-plugin:6.5.0.Final-redhat-2
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/home/tkobayas/.m2/repository/org/kie/kie-maven-plugin/6.5.0.Final-redhat-2/kie-maven-plugin-6.5.0.Final-redhat-2.jar
[ERROR] urls[1] = file:/home/tkobayas/.m2/repository/org/codehaus/plexus/plexus-utils/3.0.20/plexus-utils-3.0.20.jar
...
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
[ERROR] 
[ERROR] -----------------------------------------------------
[ERROR] : org.apache.commons.lang.StringUtils
[ERROR] -> [Help 1]