Include deps class in unit test for postgresql

Change-Id: I29591b946129e970eb051626b03059e692407a97

spec/classes/ceilometer_db_postgresql_spec.rb

@@ -16,6 +16,8 @@ describe 'ceilometer::db::postgresql' do
         req_params
       end
 
+      it { is_expected.to contain_class('ceilometer::deps') }
+
       it { is_expected.to contain_openstacklib__db__postgresql('ceilometer').with(
         :user       => 'ceilometer',
         :password   => 'ceilometerpass',