change to chmod as privileged user.
edxapp-git-auth: allow authenticated edx-platform/edx-theme checkouts
Change how abby gets notified.

We were previously using the jenkins api which was more complicated than the
buildByTokens plugin and its API.
Merge pull request #731 from edx/feanil/secure_release

Change how abby gets notified.
Changes to make the forums run using unicorn and
unix sockets.
fix permissions.
Test changes.
Use the clustering logic we use with rabbit.
Set the hosts like elasticsearch expects.
A play to build the elasticsearch server.
Setting default username to root and defalut db name to edxapp.
Merge pull request #734 from edx/feanil/update_cloudformation

Setting default username to root and defalut db name to edxapp.
edxapp-git-auth: Add `EDXAPP_USE_GIT_IDENTITY` boolean to switch on/off

Using `EDXAPP_LOCAL_GIT_IDENTITY` gives parsing errors during evaluation for paths
Adding template for defaults.
Moving template to standard structure.
Moved, removing.
Reasonable working version.
Basic play for stage.
Merge pull request #727 from antoviaque/edxapp-git-auth

edxapp-git-auth: allow authenticated edx-platform/edx-theme checkouts
Relocating.