[birt-dev] Checkin: fix 137141 The column name is lost when drag the dat

["Yuejie Chen" <yuejie.chen@xxxxxxxxxxx>]

- Summary: fix 137141
The column name is lost when drag the dataset to the layout.
- Bugzilla Bug (s) Resolved:
137141
- Description:
Set table header label text as column name

- 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/internal/ui/dnd/InsertInLayoutUtil.java

- Files Added:

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