One should have an ability to set up max_stacks_per_tenant option

Customer requires from us to set up max_stacks_per_tenant in
heat.conf.

This option is not enabled and has value of 100 by default.
We need to enable this option in templates so customer would be
able to set it to a desired value.

Customer-Found
PROD-15877

Change-Id: If324c8b65c6df36a614139ac75b2667d1c874284
9 files changed