John Skarbek authored Apr 29, 2019 and Robert Speicher committed Apr 29, 2019

* With the recent work to rely on creating a commit to start a pipeline,
these created a bit of havoc for nightly builds due to using the same
process.
  * The master branch was unnecessarily updated with the versions inside
  of omnibus which is undesired
* This commit strives to find a way to continue building nightlies from
passing builds
* We do this by determining if we are using an auto-deploy branch
  * if not, we'll create a temporary branch inside the dev environment
  in order to compile the frontend assets needed for the build
  * We trigger a build in omnibus using a large set of environment
  variables including:
    * all versions of gitlab components
    * setting nightly to true, allowing a package to be built
  * The trigger is set to wait 3 hours
  * After waiting we'll delete the branch as it's no longer required