Description of problem:
"Run Garbage Collector" operation fails when performed as alert notification during alert firing.

How reproducible:
It is reproduced always 

Steps to Reproduce:
1. Go to "Administration\Alert Definition Templates\RHQ Agent"\"rhq-agent-env.sh" resource
2. Create alert definition with:
      name: test
      priority: major
      condition: Availability Goes down
      notification: Resource operation\Specific resource
                   'Run Garbage Collection' on the ( localhost > RHQ Agent > JVM > Memory Subsystem ) resource
3. Rename file rhq-agent-env.sh
4. Alert is fired
5. Go to tab Notfications into new alert details view
6. Go to localhost > RHQ Agent > JVM > Memory Subsystem and check operation results

Actual results:
1. OK
2. OK
3. OK
4. OK
5. OK, notification executed and status deffered
6. NOK, operation has status Failed and consists following error.
java.lang.IllegalStateException: Name [operation-definition-name] specified for parameter of operation [gc] on MBean [java.lang:type=Memory] is invalid. The MBean operation does not take a parameter by that name.
	at org.rhq.plugins.jmx.MBeanResourceComponent.invokeOperation(MBeanResourceComponent.java:659)
	at org.rhq.plugins.jmx.MBeanResourceComponent.invokeOperation(MBeanResourceComponent.java:607)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocation.call(ResourceContainer.java:654)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	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:722) 


Expected results:
1. OK
2. OK
3. OK
4. OK
5. OK, notification executed and status deffered
6. OK, operation status Success and no exceptions in server log

Additional info:
The server.log contains many exceptions. It is occured if 12 alert one by one will be fired every 1 seconds.