feat: split metadata into smal pieces

otc_metadata/__init__.py

@@ -9,13 +9,13 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-__all__ = ['__version__', 'Docs']
+__all__ = ["__version__", "Docs"]
 
 import pbr.version
 
 from otc_metadata.services import Services  # flake8: noqa
 
-__version__ = pbr.version.VersionInfo('otc-metadata').version_string()
+__version__ = pbr.version.VersionInfo("otc-metadata").version_string()
 _service_manager = None