Stop crashing the plugin page by optimistically parsing files

Check whether or not we can actually split on colons for the files
we find instead of trying to do so and crashing so we're not
dependent on edit-node writing metadata for the plugin page
to work.

Change-Id: Ieaf009e86b50e2a83d401f6a4dc6a2cb6c6a2e60
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=988982
Signed-off-by: Ryan Barry <rbarry@redhat.com>