command not found errors on unstack

- add lib/ceilometer and lib/heat to source list for when stop_heat
and stop_ceilometer functions are called.
- add lib/tls source to lib/keystone for when is_ssl_enabled_service
function called.

Change-Id: Ief05766e9cfda71fb6392c8a757d04751283414e
Closes-Bug: #1269047
(cherry picked from commit 5eec5b6b80401842ad1f7275d9c7a6949cc6f848)
Merge "command not found errors on unstack" into stable/havana