Update hacking for Python3

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Fix problems found.

Change-Id: Ica99c9a4affd2b693ef74f1e3ef7c8ea2c6a46d6

ceilosca/ceilometer/publisher/monasca.py

@@ -124,7 +124,7 @@ class MonascaPublisher(publisher.ConfigPublisherBase):
         except Exception:
             LOG.info(traceback.format_exc())
             if hasattr(self, 'archive_handler'):
-                    self.archive_handler.publish_samples(None, metrics)
+                self.archive_handler.publish_samples(None, metrics)
 
     def publish_samples(self, samples):
         """Main method called to publish samples."""

test-requirements.txt

@@ -1,3 +1,4 @@
+hacking>=3.0,<3.1.0 # Apache-2.0
 git+https://github.com/openstack/ceilometer.git@master#egg=ceilometer
 mock>=1.2 # BSD
 testscenarios>=0.4 # Apache-2.0/BSD
@@ -11,4 +12,4 @@ oslo.log>=1.14.0 # Apache-2.0
 os-testr>=1.0.0 # Apache-2.0
 python-monascaclient<=1.12.0  # Apache-2.0
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
-hacking<0.11,>=0.10.0
+

tox.ini

@@ -26,6 +26,7 @@ commands = {posargs}
 max-line-length = 100
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 show-source = True
+ignore = E402,W504
 
 [hacking]
 import_exceptions =