rbd: manage admin key from a new class

Previously, the key was managed from the site.pp which is not the best
way when moving to Hiera.

Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>

manifests/storage/rbd/key.pp

@@ -0,0 +1,27 @@
+#
+# Copyright (C) 2014 eNovance SAS <licensing@enovance.com>
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+
+class cloud::storage::rbd::key (
+) {
+
+  if !empty($::ceph_admin_key) {
+    @@ceph::key { 'admin':
+      secret       => $::ceph_admin_key,
+      keyring_path => '/etc/ceph/keyring',
+    }
+  }
+
+}