Add support to deploy-testenv for multiple environments

Includes configuration to build a heat stack of testenvs on the
HP, Red Hat and local devtest environments.

Requires: I1209f6b933446d0ad55096ef7d94f5b3c9114321

Change-Id: Ibdb59581adbfeb2e0fb9ec564c3b87ae6250653b
Merge "Add support to deploy-testenv for multiple environments"