Base tests for stop/reset environment feature

Add next tests to verify stop/reset feature:
* Stop deployment on deploy task. No ready nodes
  add cinder node. Redeploy
* stop deployment on provisioning task
  Add node. Redeploy (skip for now)
* Reset on ready enviroment. Update
  networks. Redeploy.
* Deploy HA with 3 controllers. Stop.
  Add 2 computes. Redeploy. Verify

Closes-bug: #1277039
Change-Id: I7ffe6217541ed65f83c7e397da44683cec57baa9