Extract tripleo jobs to templates

Create new templates check-tripleo-jobs and
experimental-triple-jobs and use them everywhere.

Patch ported over from https://review.openstack.org/#/c/84026, rebased
and enhanced.

Co-Authored-By: Sergey Lukjanov <slukjanov@mirantis.com>

Change-Id: I83535f051d53837ca9a2cde2484c67775ff6b0e5
Merge "Extract tripleo jobs to templates"