Removing 'disable_constraints' key from role validation schema
Removing 'disable_constraints' key from role validation schema

The key doesn't appear to be in use anymore [0]
and was original scheduled for removal in Ussuri.

Keeping it around any longer would invite confusion.

[0] https://codesearch.openstack.org/?q=disable_constraints&i=nope&literal=nope&files=&excludeFiles=&repos=

Signed-off-by: Jiri Podivin <c67e25c244967c2b045125ef84e6068d21a6616f@redhat.com>
Change-Id: Ic1c34721d75e3064fb0a1eb5f6076a04d3453df9

openstack/tripleo-common,openstack/tripleo-common