Tempest should create his own flavors

* Decrease memory usage caused by tempest significantly

Change-Id: I0ea59d9bb1fbeb93f04353bc6b4e148637edf945
Support RHEL with lsb_release

Consider all distributor as "Red Hat" which id matches to the Red.*Hat regexp.

Example Distributor ID: "RedHatEnterpriseServer"

Change-Id: I29cc2e83cccaafa3e1e056e506fda5c9771764a1
Merge "Tempest should create his own flavors"