Added Outbrain widgets

This is without any styling whatsoever.
Outbrain now switchable
Outbrain loading works now

Although not locally.
updating page with tweaked template code
Merge branch 'master' into commercial-update-component-page
Test page skins are ignored in PROD

Look at them in CODE instead.
Stepped up framework version
some fixes to video tracking
Merge remote-tracking branch 'origin/master' into testPageskinsInCode

Conflicts:
	common/app/dfp/DfpAgent.scala
	common/app/dfp/DfpData.scala
	common/test/dfp/DfpAgentTest.scala
Updated test data
Force OK on cdn healthcheck, this is an emergency fix, will do properly later
Merge pull request #5205 from guardian/quick-fix

Force OK on cdn healthcheck, this is an emergency fix, will do properly ...
more fixes for video tracking
Merge remote-tracking branch 'origin/master' into outbrain

Conflicts:
	article/app/views/fragments/articleBody.scala.html
Merge remote-tracking branch 'origin/master' into outbrain
Merge remote-tracking branch 'origin/master' into testPageskinsInCode
Merge pull request #5180 from guardian/video-tracking-fixes

fixes to video tracking
Outbrain placeholders now in a fragment.
Add (awfully styled) related keywords to tag pages
Style the related keywords