Add oslo::db to dependency chain

All db settings should be applied and all releated packages should be
installed before dbsync starts.

Change-Id: Ibd972deda629d52ef00a02504157d438f29bc177

manifests/deps.pp

@@ -29,6 +29,10 @@ class manila::deps {
   -> Manila_api_paste_ini<||>
   ~> Anchor['manila::config::end']
 
+  # all db settings should be applied and all packages should be installed
+  # before dbsync starts
+  Oslo::Db<||> -> Anchor['manila::dbsync::begin']
+
   # policy config should occur in the config block also.
   Anchor['manila::config::begin']
   -> Openstacklib::Policy::Base<||>