Description of problem:
Debugging of Drools project doesn't stop at breakpoints and runs without stopping to the end.


Version-Release number of selected component (if applicable):
- JBoss Developer Studio Drools plugin:
  - JBoss Drools Core    5.3.4.201210090942
  - JBoss Drools Guvnor  5.3.4.201210090942
  - JBoss Drools Task    5.3.4.201210090942

- BRMS runtime         5.3.1.BRMS-ER4

- JBDS 5.0.0.Final


How reproducible:
Follow next steps

Steps to Reproduce:
1. create new Drools runtime and set it as default
2. create new Drools Project with default Drools runtime and add all sample codes
3. open src/main/rules/Sample.drl and add breakpoint to 9th line
4. right click on src/main/java/DroolsTest.java and execute Debug as Drools application

  
Actual results:
- application is running to the end without stopping at breakpoint


Expected results:
- execution should stop at the breakpoint


Additional info:
- debugging is working properly with BRMS runtime 5.3.1.ER3