Move globals into main level 0 case
Move globals into main level 0 case

This change moves all of the global content into a main
case, which, in a follow on review, will allow us to
futher refactor the content into better documented
methods, ansible modules, etc.

Change-Id: I4538b58334af80cb2c9bd1233e122e3f73e7988c
Signed-off-by: Kevin Carter <1d9a750a4fc7026fb02029431dc8a87d24487135@redhat.com>

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates