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
diff --git a/unstack.sh b/unstack.sh
index 77dbe07..4445f1f 100755
--- a/unstack.sh
+++ b/unstack.sh
@@ -35,10 +35,12 @@
 
 # Get project function libraries
 source $TOP_DIR/lib/baremetal
+source $TOP_DIR/lib/ceilometer
 source $TOP_DIR/lib/cinder
 source $TOP_DIR/lib/keystone
 source $TOP_DIR/lib/glance
 source $TOP_DIR/lib/nova
+source $TOP_DIR/lib/heat
 source $TOP_DIR/lib/horizon
 source $TOP_DIR/lib/swift
 source $TOP_DIR/lib/neutron