- Added new method to MimetypeService to retrieve a valid mimetype given any extension, handling case and missing values
- Updated JUnit tests for MimetypeService methods
- Fixed callers of MimetypeService to use new method to protect against varying case of file extensions (ALF-2118 root cause)
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@19400 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261