Deprecate classes to set up Ceilometer DB

Since metric/event storage was offloaded to Gnocchi/Panko, ceilometer
no longer requires its own backend storage.

Change-Id: Idf9904e7e8f1b5eca3f25cd37fb83e9adbca0995

manifests/db.pp

@@ -1,5 +1,6 @@
 # == Class: ceilometer::db
 #
+#  DEPRECATED !!
 #  Configures the ceilometer database
 #  This class will install the required libraries depending on the driver
 #  specified in the connection_string parameter
@@ -64,6 +65,8 @@ class ceilometer::db (
 
   include ceilometer::deps
 
+  warning('The ceilometer::db class has been deprecated and will be removed in a future release.')
+
   oslo::db { 'ceilometer_config':
     db_max_retries          => $database_db_max_retries,
     connection              => $database_connection,

manifests/db/mysql.pp

@@ -46,6 +46,8 @@ class ceilometer::db::mysql(
 
   validate_legacy(String, 'validate_string', $password)
 
+  warning('The ceilometer::db::mysql class has been deprecated and will be removed in a future release.')
+
   openstacklib::db::mysql { 'ceilometer':
     user          => $user,
     password      => $password,

manifests/db/postgresql.pp

@@ -34,6 +34,8 @@ class ceilometer::db::postgresql(
 
   include ceilometer::deps
 
+  warning('The ceilometer::db::postgresql class has been deprecated and will be removed in a future release.')
+
   openstacklib::db::postgresql { 'ceilometer':
     password   => $password,
     dbname     => $dbname,

releasenotes/notes/deprecate-db-opts-a3420b13a23eacf1.yaml

@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    The following classes have been deprecated and will be removed in a future
+    release.
+
+    - ``ceilometer::db``
+    - ``ceilometer::db::mysql``
+    - ``ceilometer::db::postgresql``