Convert heat, heat-api, and heat-engine elements to use puppet
Don't specify absolute path to heat-manage

Packaging installs it to a different path then the traditional
element.
Sort manifest files sharing same prefix in reverse order

For elements sharing the same prefix, their manifests
will then be combined in alphabetical order according
to the filename.
Add os-svc-install to puppet element as a dependency

Although we do not need os-svc-install or os-svc-daemon,
os-db-create is still used by boot-stack/bin/reset-db.