Revision controller panics on certain failures

[mdemirhan]

/area API
/kind bug

Expected Behavior

Elafros controllers should handle errors that can happen transiently and should not panic.

Actual Behavior

Revision controller (revision.go) panics in the following situations:

• Failure to get or create the namespace for a revision
• Failure to get metadata for a revision

[mattmoor]

/assign @mdemirhan

Is this still an issue?

[mdemirhan]

This is no longer an issue. Closing.