Fix H405 violations

There are H405 violation codes.
We need to fix the code for avoiding more violations.

Change-Id: I8084ae4b91961a302b52dc66c3d342be1b753ecc
Closes-Bug: #1521899

kuryr/controllers.py

@@ -54,8 +54,7 @@ else:
 
 
 def check_for_neutron_ext_support():
-    """Validates for mandatory extension support availability in neutron.
-    """
+    """Validates for mandatory extension support availability in neutron."""
     try:
         app.neutron.show_extension(MANDATORY_NEUTRON_EXTENSION)
     except n_exceptions.NeutronClientException as e:

kuryr/tests/test_join.py

@@ -28,8 +28,7 @@ from kuryr import utils
 
 @ddt.ddt
 class TestKuryrJoinFailures(base.TestKuryrFailures):
-    """Unit tests for the failures for binding a Neutron port to an interface.
-    """
+    """Unit tests for the failures for binding a Neutron port."""
     def _invoke_join_request(self, docker_network_id,
                              docker_endpoint_id, container_id):
         data = {

kuryr/tests/test_leave.py

@@ -28,8 +28,7 @@ from kuryr import utils
 
 @ddt.ddt
 class TestKuryrLeaveFailures(base.TestKuryrFailures):
-    """Unit tests for the failures for unbinding a Neutron port.
-    """
+    """Unit tests for the failures for unbinding a Neutron port."""
     def _invoke_leave_request(self, docker_network_id,
                               docker_endpoint_id):
         data = {

tox.ini

@@ -37,10 +37,8 @@ commands = python setup.py build_sphinx
 # H305 imports not grouped correctly
 # H307 like imports should be grouped together
 # H402 one line docstring needs punctuation
-# H404 multi line docstring should start with a summary
-# H405 multi line docstring summary not separated with an empty line
 # H904 Wrap long lines in parentheses instead of a backslash
-ignore = E125,E126,E128,E129,E265,H301,H305,H307,H402,H404,H405,H904
+ignore = E125,E126,E128,E129,E265,H301,H305,H307,H402,H904
 show-source = true
 
 # TODO(dougw) neutron/tests/unit/vmware exclusion is a temporary services split hack