Fix H404/405 violations for unit tests

There is a lot of H404/405 violations in Tempest now, and that leads
difficult to migrate the code to tempest-lib or the other projects'
repos. This patch fixes these violations for unit tests.

Change-Id: Ib2418300b2679bee477c84cd0943382d031ff4a9

tempest/tests/base.py

@@ -26,8 +26,7 @@ class TestCase(base.BaseTestCase):
         self.stubs = mox_fixture.stubs
 
     def patch(self, target, **kwargs):
-        """
+        """Returns a started `mock.patch` object for the supplied target.
-        Returns a started `mock.patch` object for the supplied target.
 
         The caller may then call the returned patcher to create a mock object.
 

tempest/tests/fake_http.py

@@ -50,7 +50,8 @@ class fake_httplib2(object):
 class fake_httplib(object):
     def __init__(self, headers, body=None,
                  version=1.0, status=200, reason="Ok"):
-        """
+        """Initialization of fake httplib
+
         :param headers: dict representing HTTP response headers
         :param body: file-like object
         :param version: HTTP Version

tempest/tests/stress/test_stress.py

@@ -25,8 +25,7 @@ LOG = logging.getLogger(__name__)
 
 
 class StressFrameworkTest(base.TestCase):
-    """Basic test for the stress test framework.
+    """Basic test for the stress test framework."""
-    """
 
     def _cmd(self, cmd, param):
         """Executes specified command."""

tempest/tests/test_hacking.py

@@ -17,7 +17,8 @@ from tempest.tests import base
 
 
 class HackingTestCase(base.TestCase):
-    """
+    """Test class for hacking rule
+
     This class tests the hacking checks in tempest.hacking.checks by passing
     strings to the check methods like the pep8/flake8 parser would. The parser
     loops over each line in the file and then passes the parameters to the