Description of problem:
Current maven client ignores orphan po files (the po files that don't have corresponding pot files) silently.

However, get warning when orphan po file is detected has following benefits:
1) Less misleading
2) It is easier for users to notice the change so they can take corresponding actions, like a) remove the orphan file or b) discuss with upstream about the change.


Version-Release number of selected component (if applicable):
1.4-SNAPSHOT (20110623-1549)


How reproducible:
Always

Steps to Reproduce:
1. git clone git://git.fedorahosted.org/docs/deployment-guide.git
2. cd deployment-guide; git checkout f13
3. Create a project "deployment-guide" in zanata, and a version as "f13"
4. Push the project to zanata server
  
Actual results:
Orphan po files do not trigger warning.

Expected results:
Orphan po files trigger warning like:
[Warning] XXX.po is orphaned.


Additional info: