Configure radosgw and ceph-rgw as optional services

radosgw is a now an optional platform service which is provisioned via a
system service parameter. To align with this optionality, the ceph-rgw
chart which is used to enable the containerized swift endpoints also
becomes optional.

Changes include:
- Update the stx-openstack application disabled_charts setting in the
  application metadata.yaml to include the ceph-rgw chart. This sets the
  initial chart state to disabled.
- Optimize ceph.pp puppet manifests to provide two runtime classes: one
  for setting up the platform radosgw configuration which will set the
  haproxy configuration and the other for updating the keystone
  information in the ceph configuration based on if the ceph-rgw chart
  is enabled.
- Update the sm.pp manifest to dynamically provision/deprovision the
  radosgw based on if it's enabled in the service parameters
- Rename the SWIFT service parameters to RADOSGW as this is the platform
  service being enabled.
- Restructure ceph.py/ceph.pp to generate and use hieradata such that
  _revert_cephrgw_config() and _update_cephrgw_config() can be combined
  into a single function for runtime updates.

Change-Id: Id8d5c6b1159881d44810fc3622990456f1e54e75
Depends-On: If284f622ceac48c4ffd74e7022fdd390971d0fd8
Partial-Bug: #1833738
Signed-off-by: Robert Church <robert.church@windriver.com>

stx-openstack-helm/stx-openstack-helm/files/metadata.yaml

@@ -2,6 +2,7 @@ disabled_charts:
 - aodh
 - barbican
 - ceilometer
+- ceph-rgw
 - gnocchi
 - ironic
 - panko