Avoid using internal exec resources for dependencies

... so that we can refactor resources in ceph::pool.

Change-Id: I98c66422b92a5a1b64ab90f646713f60b175645e
(cherry picked from commit 9e4cd7852e7dd321e42dcd77a0664362120030d7)

manifests/cinder.pp

@@ -162,7 +162,7 @@ class openstack_integration::cinder (
         manage_volume_type => true,
       }
       # make sure ceph pool exists before running Cinder Volume
-      Exec['create-cinder'] -> Service['cinder-volume']
+      Ceph::Pool['cinder'] -> Service['cinder-volume']
     }
     default: {
       fail("Unsupported backend (${backend})")
@@ -191,7 +191,7 @@ class openstack_integration::cinder (
         backup_ceph_user => 'openstack',
       }
       # make sure ceph pool exists before running Cinder Backup
-      Exec['create-backups'] -> Service['cinder-backup']
+      Ceph::Pool['backups'] -> Service['cinder-backup']
     }
     default: {}
   }

manifests/glance.pp

@@ -70,7 +70,7 @@ class openstack_integration::glance (
         rbd_store_pool => 'glance',
       }
       # make sure ceph pool exists before running Glance API
-      Exec['create-glance'] -> Service['glance-api']
+      Ceph::Pool['glance'] -> Service['glance-api']
       $default_backend = 'rbd1'
     }
     'swift': {

manifests/gnocchi.pp

@@ -108,7 +108,7 @@ class openstack_integration::gnocchi (
         manage_rados  => true,
       }
       # make sure ceph pool exists before running gnocchi (dbsync & services)
-      Exec['create-gnocchi'] -> Exec['gnocchi-db-sync']
+      Ceph::Pool['gnocchi'] -> Anchor['gnocchi::dbsync::begin']
     }
     'swift': {
       class { 'gnocchi::storage::swift':

manifests/nova.pp

@@ -265,7 +265,7 @@ class openstack_integration::nova (
       manage_ceph_client      => false,
     }
     # make sure ceph pool exists before running nova-compute
-    Exec['create-nova'] -> Service['nova-compute']
+    Ceph::Pool['nova'] -> Service['nova-compute']
   } else {
     include openstacklib::iscsid
     Service['iscsid'] -> Service['nova-compute']