Add openstack/heat-cfntools to gerrit review

https://github.com/heat-api/heat-cfntools

heat-cfntools contains scripts which need to be installed on
heat provisioned guests. These scripts have recently been broken out
of the heat-jeos repo, so the next task is getting better test coverage.

This change will populate openstack/heat-cfntools using
the existing heat-api/heat-cfntools as upstream

Change-Id: I71ec9b12bf9cdef333d540812a4eeb8a7e593d93
Reviewed-on: https://review.openstack.org/22931
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Steven Dake <sdake@redhat.com>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins