Does it make sense to have an exact copy of a class, like this: 

diff drools-core/src/test/java/org/drools/reteoo/test/parser/DroolsParserException.java
      drools-compiler/src/main/java/org/drools/compiler/DroolsParserException.java

17c17
< package org.drools.reteoo.test.parser;
---
> package org.drools.compiler;

All right, they are in different packages and even different (sub-)projects, but still...