[birt-dev] Checkin: Fix an OSGI exception in chart viewer log

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

- Summary:
Fix an OSGI exception in chart viewer log

- Bugzilla Bug (s) Resolved:

- Description:
Fix an OSGI exception in chart viewer log by setting standalone mode when http session is being created. This makes sure any plugin settings are loaded as standalone.

- Tests Description: Manual Test

- Notes to Build Team: N/A

- Notes to Developers: N/A

- Notes to QA: N/A

- Notes to Documentation: N/A

- Files Edited:

/org.eclipse.birt.chart.viewer/src/org/eclipse/birt/chart/viewer/internal/listener/ChartHttpSessionListener.java
/org.eclipse.birt.chart.viewer/src/org/eclipse/birt/chart/viewer/internal/util/ChartImageManager.java

- Files Added:

- Files Deleted