[birt-dev] CheckIn: Added max restriction for bubble chart

["Yulin Wang" <yulin.wang@xxxxxxxxxxx>]

- Summary:
Added max restriction for bubble chart

- Bugzilla Bug (s) Resolved:


- Description:
To avoid the bubble taking up too much space, add a max restriction for the bubble chart by multiplying a coefficient by each bubble size.

- Tests Description: Manual test
- Notes to Build Team: None
- Notes to Developers: None
- Notes to QA: None
- Notes to Documentation: None

- Files Edited:
/org.eclipse.birt.chart.engine.extension/src/org/eclipse/birt/chart/render/Bubble.java

- Files Added:

- Files Deleted