[birt-dev] CheckIN:Fix bugzill Bug 168809Duplicate dataset in Edit Joint

["Mingxia Wu" <mwu@xxxxxxxxxxx>]

Title: CheckIN:Fix bugzill Bug 168809Duplicate dataset in Edit Joint Data Set after create a joint data set[07]

- Summary:
Fix bugzilla bug 168809 Duplicate dataset in Edit Joint Data Set after create a joint data set[07]

- Bugzilla Bug (s) Resolved:
Bug 168809

- Description:
This bug caused by adding library’s dataset which might be used in joint dataset. But if we define one jointdataset in library, the used dataset should not be added again. Fix it now!

- Tests Description:
Manual test

- Notes to Build Team:

- Notes to Developers:

- Notes to QA:  

- Notes to Documentation:  

- Files Edited:
"/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/dataset/JointDataSetPage.java"

- Files Added:

- Files Deleted