Resolve split-packages: move everything from drools-compiler under org.drools.compiler: first move org.drools.compiler under org.drools.compiler.compiler to avoid a mess
Resolve split-packages: move everything from drools-compiler under org.drools.compiler: move org.kie (the part under drools-compiler)
Resolve split-packages: move everything from drools-compiler under org.drools.compiler: move org.drools.lang