This was a combination of 2 bugs:
* we didn't do deep_merge on config in ruby app, so
that any nested properties set in the javascript app would be
overwritten
* channelPrefix was not properly set for Travis CI Pro
Fingerprinting filter that Brocolli uses to add checksums to filenames
apparently is very greedy. When a URL that has a valid image is present
in ENV, fingerprint filter will going to wipe out the entire config's
meta tag value with fingerprinted url with an asset host.
If user is logged in and doesn't keep 'recent repositories' tab opened, most of
the pusher events from 'common' channel are useless.
This commit introduces a logic to reject pusher events if:
* recent tab hasn't been opened
* user is signed in
* Travis CI for open source is used
* repository for a given event is not yet in store
* repository for a given event is not part of current user's repositories
