[birt-dev]CheckIn: Fix Bugzilla Bug --- 139372 Relative path is not supp

["Wei Yan" <wyan@xxxxxxxxxxx>]

Title: [birt-dev]CheckIn: Fix Bugzilla Bug --- 139372 Relative path is not supported in background image

- Summary: support resource deployment for background image.

- Bugzilla Bug (s) Resolved:
139372 Relative path is not supported in background image

- Description:
The background image defined in the style should be located through MODEL's IResourceLocator.
If the resource is not found, use the URI defined in the style directly.

- Tests Description  :
Manual Test.

- Notes to Build Team:

- Notes to Developers:

- Notes to QA:  
 
- Notes to Documentation:  

- Files Edited:
cvs ci -m "support resource deploy in background image" -l "/org.eclipse.birt.report.engine.emitter.html/src/org/eclipse/birt/report/engine/emitter/html/HTMLReportEmitter.java"

- Files Added:

- Files Deleted

-Wei Yan