Clean up Federation

[Jessica Tallon]

Elrond found some issues over his review of the federation code recently merged. These need fixing before 0.7.0.

Garbage Collection

• This task should be moved to submit
• This task uses the wrong operator in garbage collection (greater than rather than less then)
• The test sets entry.uploaded not entry.created ergo doesn't do anything.
• Logging is wrong.
• Use spaces not tabs! (WTF jess).

Feed Endpoint

• The comment is wrong (should say list all media not the users media).

Whoami Endpoint

• Doesn't handle the case where I might not be logged in

MediaComment.unserialize

• Needs to do more checking that all the data I want to look up in the dictionary exists to avoid KeyErrors.

Mediagoblin INI/Config file

• Should remove garbage_collection setting to spec file and remove it from mediagoblin.ini as it won't be commonly set.

If any more issues are found please add them to this ticket. This is a rather large issue but most of the tasks in them are so small it doesn't warrant splitting them up.