Remove 'verbose' config option initialization

'verbose' option was removed from the config, so we don't need to set in
in the functional tests.

Change-Id: I11e7f5adb2ee0cca3334764ec08904e8149a2e42
Closes-Bug: #1678094

cinder/tests/functional/functional_helpers.py

@@ -69,7 +69,6 @@ class _FunctionalTestBase(test.TestCase):
 
         f = self._get_flags()
         self.flags(**f)
-        self.flags(verbose=True)
 
         for var in ('http_proxy', 'HTTP_PROXY'):
             self.useFixture(fixtures.EnvironmentVariable(var))