Quieter unit tests

I couldn't find any options while perusing the alembic documentation
that specifically controlled logging, plus control of everything seems
to fall under the env.py umbrella, so I decided I would leave logging
unconfigured unless it was otherwise necessary.

There are still a handful of warnings that appear in the test run that
can be cleaned up later, but at least the entire run fits on one screen
again.

quark/db/migration/alembic/env.py

@@ -12,7 +12,8 @@ neutron_config = config.neutron_config
 
 # Interpret the config file for Python logging.
 # This line sets up loggers basically.
-logging_config.fileConfig(config.config_file_name)
+if not config.get_main_option("quiet_mode"):
+    logging_config.fileConfig(config.config_file_name)
 
 # other values from the config, defined by the needs of env.py,
 # can be acquired:

quark/tests/test_migrations.py

@@ -27,6 +27,7 @@ class BaseMigrationTest(test_base.TestBase):
             os.path.join(quark.db.migration.__path__[0], 'alembic.ini'))
         self.config.set_main_option('script_location',
                                     'quark.db.migration:alembic')
+        self.config.set_main_option("quiet_mode", "True")
         self.fileno, self.filepath = tempfile.mkstemp()
         secret_cfg = mock.MagicMock()
         secret_cfg.database.connection = "sqlite:///" + self.filepath