Merge changes from topic 'RELENG-704'

Merge changes from topic 'RELENG-704'

* changes:
  Use protected to prevent cleanup script rming img
  Update cleanup scripts to work in Vex
  Update Orchestration scripts to work with Vex
  Update mininet and docker builders
  Update java-builder build-nodes for new cloud
  Update packer config to work in Vexxhost