Fixes #1780 - changes EPEL url from download.fedoraproject.org to dl.fedoraproject.org

fixes #1792 - error on json output of usergroups

added a scope per proxy feature

minor cleanups for cache invalidations

fixes #1781 - clone host can fail

make sure usernames are not in the logs

fixes #1576 - api v1 - oauth support

• to use set and enable oauth in settings
• correcting typo

[SQL optimizations] - many small optimizations

• Bookmarks have only users, not usergroups
• added caching to the settings table
• removed notice message lookups (we are not really using those)...

ensures that auto completer for users search works even when you are not an admin

ensure no extra white spaces are added to the provisioning templates editor