converge transition to use single annealer call and update UI to run it

converge transition to use single annealer call and update UI to run it

WIP checkpoint on deployment (about to change to linked list)

simplify snapshot linked list to single pointer, fix propose and commit logic

fix failing tests
resolve merge
resolve merge
Merge pull request #652 from cloudedge/pull-req-master-3d51d0b1f19b5e646cad9ccb535227edcfc1361f

https://github.com/crowbar/barclamp-crowbar/pull/652

Merged by devtool for cloudedge