engine: Use multi-worker heat template in CI

Also remove obsolete HEAT_ENVIRONMENT_FILE parameter and env
variable since heat env file is not provided as PDF using -p.

Change-Id: I3086426937b3b44ee36f7b2b6ba7a2732e298e02
6 files changed
tree: 03cc0e0513bd69da4a18fe0e43282662a29521e3
  1. jjb/
  2. .gitignore
  3. .gitreview