Description of problem:
If some shell script returns something else than 0, RHQ operation only says "Exit code was '1', see operation results for details", but there are no op results. The RHQ UI should not fail with this generic message.


Version-Release number of selected component (if applicable):
RHQ 4.2

How reproducible:
Always


Steps to Reproduce:
1.run the wsprovide.sh with no arguments.
  
Actual results:
The operation will fail but the output of the failure icon will show the following generic message:

java.lang.Exception: Exit code was '1', see operation results for details
at org.rhq.core.pc.operation.OperationInvocation.run(OperationInvocation.java:278)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)



Expected results:
The operation should fail but the output of the failure icon should point to the proper cause of the failure. 


Additional info:
The same issue was raised for:

1. JBoss Admin console (EMBJOPR-344: https://issues.jboss.org/browse/EMBJOPR-344) 
2. JON (https://bugzilla.redhat.com/show_bug.cgi?id=824773)