Added discourse-solved plugin

Upgrade version from 1.9.3 to 1.9.4
Fixed the way we retrieve redis image from openshift repository (on template).

Added gsfonts to solve the problem with some blank letter avatars.

- Added some missed workers, like pngout, svgo, etc.

Update version from 1.9.1 to 1.9.3

Discourse for CERN template v1.9.1

Discourse for CERN template v1.8.10-1.2

Discourse for CERN template v1.8.10-1.1

Discourse for CERN template v1.8.10-1

Discourse for CERN template v1.8.10