Fix flake8 E305 errors.

awx/conf/conf.py

@@ -60,6 +60,7 @@ register(
 def _get_read_only_ansible_cow_selection_default():
     return getattr(settings, 'ANSIBLE_COW_SELECTION', 'No default cow!')
 
+
 register(
     'READONLY_ANSIBLE_COW_SELECTION',
     field_class=fields.CharField,

awx/conf/registry.py

@@ -118,4 +118,5 @@ class SettingsRegistry(object):
                 logger.warning('Unable to retrieve default value for setting "%s".', setting, exc_info=True)
         return field_instance
 
+
 settings_registry = SettingsRegistry()