DROOLS-228: fixing classloaders to properly resolve maven dependencies
(cherry picked from commit 4d66e90681844a92b51fb2b25d1e026a6011474d)

Conflicts:

	drools-compiler/src/test/java/org/drools/compiler/CommonTestMethodBase.java
	drools-compiler/src/test/java/org/drools/compiler/integrationtests/IncrementalCompilationTest.java