[birt-dev]CheckIn: Fix Bugzilla Bug 161706 --- NPE thrown when getting h

["Wei Zhao (Shang)" <wei.zhao@xxxxxxxxxxx>]

Title: [birt-dev]CheckIn: Fix Bugzilla Bug 161706 --- NPE thrown when getting help text of cascading parameter group

- Summary:
Set the reportDesign to to cascading parameter group.

- Bugzilla Bug (s) Resolved:
Fix Bugzilla Bug 161706 --- NPE thrown when getting help text of cascading parameter group

- Description:
Did not set the reportDesign to to cascading parameter group. So when call getHelpText function. report design was null, then NPE throwed.

- Tests Description  :
Manual Test.

- Notes to Build Team:

- Notes to Developers:

- Notes to QA:  
 
- Notes to Documentation:  

- Files Edited:
"/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/GetParameterDefinitionTask.java"

- Files Added:

- Files Deleted

-Wei Zhao( Shanghai )