NullPointerException during creating KieBase if using "KieClasspathContainer" and xsd type resource is present

Issue

When using the code below to get KieBase, if using KieClasspathContainer and there is .xsd type resource present in the classpath, NullPointerException will be thrown.

    KieServices ks = KieServices.Factory.get();
    KieContainer kContainer = ks.getKieClasspathContainer();
    KieBase kBase = kContainer.getKieBase("kbase");
    ......

The exception stacktrace looks like:

Exception in thread "main" java.lang.NullPointerException
    at org.drools.compiler.compiler.PackageBuilder.addPackageFromXSD(PackageBuilder.java:823)
    at org.drools.compiler.compiler.CompositeKnowledgeBuilderImpl.buildResources(CompositeKnowledgeBuilderImpl.java:209)
    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.KieContainerImpl.createKieBase(KieContainerImpl.java:387)
    at org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBase(KieContainerImpl.java:347)
......