[birt-dev] Checkin: Clean up app context related constants; adds option

["Stanley Wang" <swang@xxxxxxxxxxx>]

- Summary:
Clean up app context related constants. Also adds option for user to specify PDF image resolution

- Bugzilla Bug (s) Resolved:

- Description:
AppContext allows user to pass in various custom-defined or BIRT optional name/value pairs. Created an EngineConstants class to define names for various optional context objects that BIRT expects. Also, added an option for user to specify PDF image resolution. The constant is EngineConstants.APPCONTEXT_CHART_PRINT_RESOLUTION.

- Tests Description:
Engine unit test

- Files Removed:

 

- Files Edited:

org.eclipse.birt.report.engine.presentation/LocalizedEmitter.java

org.eclipse.birt.report.engine.api/ReportRunner.java

org.eclipse.birt.report.engine.api/HTMLRenderContext.java

org.eclipse.birt.report.viewer.aggregation.layout/EngineFragment.java

- Files Added:

Org.eclipse.birt.report.engine.api/EngineConstants.java

- Notes to Build Team:

- Notes to Developers:

- Notes to QA: 
 
- Notes to Documentation: