Fix mariadb repo setup

Instead of always creating the mariadb default repository we should
only do it when requested by the node environment.

Do this implicitly via the mariadb_client_install resource that has
an option to decide whether a repo should be set up or not.

Change-Id: I4f62dd7a7df247ddb787553bef58ca81d8e062fb

recipes/mariadb-client.rb

@@ -15,12 +15,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-mariadb_repository 'default' do
-  version node['openstack']['mariadb']['version']
-end
-
 mariadb_client_install 'default' do
   version node['openstack']['mariadb']['version']
+  setup_repo node['mariadb']['use_default_repository']
 end
 
 node['openstack']['db']['python_packages']['mariadb'].each do |pkg|

spec/mariadb-client_spec.rb

@@ -14,10 +14,6 @@ describe 'openstack-ops-database::mariadb-client' do
       runner.converge(described_recipe)
     end
 
-    it do
-      expect(chef_run).to add_mariadb_repository('default').with(version: '10.3')
-    end
-
     it do
       expect(chef_run).to install_mariadb_client_install('default').with(version: '10.3')
     end