Sheriffing/Uplift-Sim

In order to prevent long Tree-Closures after Release Merge Day, Sheriffs are now doing regular simulations of Code Merges from like Trunk -> Aurora, Aurora -> Beta and Trunk -> Beta

The steps how to do this Simulations are documented here :

• Bump Version Numbers on trunk
• Trunk-> Aurora
• Simulate use Aurora update channel like Aurora nightlies
• Trunk to Beta
• Use Beta update channel like Beta release builds
• Aurora-Beta

Also configs are in https://bugzilla.mozilla.org/show_bug.cgi?id=1280663

Results for the Try runs are here :

https://treeherder.mozilla.org/#/jobs?repo=try&author=cbook@mozilla.com