ceilometer-next needs lint cleanup

lp:~openstack-charmers/charms/trusty/ceilometer/next needs some tidying of lint:

00:00:28.747 Creating new checkout of lp:~openstack-charmers/charms/trusty/ceilometer/next @ /var/lib/jenkins/checkout/ceilometer.
00:00:37.682 Gathering info about branch...
00:00:37.684 `Makefile' -> `/var/lib/jenkins/workspace/charm_lint_check/Makefile.153'
00:00:49.107 52
00:00:57.996 Lightweight checkout (format: 2a)
00:00:57.996 Location:
00:00:57.996 light checkout root: .
00:00:57.996 checkout of branch: bzr+ssh://bazaar.launchpad.net/~openstack-charmers/charms/trusty/ceilometer/next/
00:00:57.996
00:00:57.996 Related branches:
00:00:57.996 parent branch: bzr+ssh://bazaar.launchpad.net/+branch/charms/trusty/ceilometer/
00:00:57.996 stacked on: /+branch-id/735282
00:00:58.244 Checking lint...
00:00:58.244 + pwd
00:00:58.244 /var/lib/jenkins/checkout/ceilometer
00:00:58.244 + tee /var/lib/jenkins/workspace/charm_lint_check/make-lint.153
00:00:58.246 + make lint
00:00:58.497 hooks/ceilometer_hooks.py:9:1: F401 'unit_get' imported but unused
00:00:58.497 hooks/ceilometer_hooks.py:37:1: F401 'get_address_in_network' imported but unused
00:00:58.497 hooks/ceilometer_hooks.py:99:1: E302 expected 2 blank lines, found 1
00:00:58.497 hooks/ceilometer_hooks.py:106:33: W291 trailing whitespace
00:00:58.497 hooks/ceilometer_hooks.py:118:6: W291 trailing whitespace
00:00:58.497 hooks/ceilometer_hooks.py:122:80: E501 line too long (87 > 79 characters)
00:00:58.497 hooks/ceilometer_utils.py:54:1: E265 block comment should start with '# '
00:00:58.497 hooks/ceilometer_utils.py:55:1: E265 block comment should start with '# '
00:00:58.497 hooks/ceilometer_utils.py:59:1: E265 block comment should start with '# '
00:00:58.508 make: *** [lint] Error 1
00:00:58.508 + [[ 2 != \0 ]]
00:00:58.508 + echo 'Lint check failed.'
00:00:58.508 Lint check failed.
00:00:58.508 + touch /var/lib/jenkins/workspace/charm_lint_check/make-lint.failed
00:00:58.509 + exit 1
00:00:58.516 Build step 'Execute shell' marked build as failure
00:00:58.538 Archiving artifacts
00:00:58.570 Sending e-mails to: <email address hidden>
00:00:58.794 Finished: FAILURE