Add charmhelpers.contrib.hardening and calls to install,
config-changed, upgrade-charm and update-status hooks. Also
add new config option to allow one or more hardening
modules to be applied at runtime.

Change-Id: I7752d72cc5a3f47fe66bca23aac730d76af8556a

The new release of charm-tools no longer ships the charm
command; update minimum version requirement and switch
to using charm-proof instead, unblocking current pep8
failures across all charms.

Also pin the version of requests to 2.6.0 until theblues
(indirect dependency of charm-tools) sort out its
requirements versioning.

Change-Id: I0431192e165353aa2fd414f06afaf6ce132f9970

Adds improved pause and resume unit to the charm such tha the
charm stays paused during maintenance operations.  Updates the
basic_deployment.py to use the the new version of
python-ceilometerclient (that's available in xenial, but works
back to icehouse/precise.

Change-Id: I869e467d0e4d9fecd661a6f946d45e31535ea11e

Modify the Makefile to point at the appropriate tox targets
so that tox and Make output can be equivalent. This involves
mapping the lint target to the pep8 target and the test target
to the py27 target.

Change-Id: I47859e9b828a007eb3496cc6f0cfabef3e6add2c

Rework ceilometer.conf to remove use of deprecated groups and options.

Don't install aodh alarming services for Mitaka; this will be handled in
a new aodh charm.

Rework upgrade tests from precise-havana -> trusty-kilo.

Change-Id: I74112fd6206665bbb7a20eaa5be15ac85116ae03

Grizzly and Havana have been unsupported for some time; remove
templates as they are no longer tested or required.

Change-Id: I97377182fe28e3f7aa98784b537e1a353a58280d

Change-Id: I63f6b93231da67094ccb1c81c7b114e8e48124f5

The charm should always update ceilometer relation data when identity-relation
data is changed.

Change-Id: I8e8acacd30b9be0d63464427015358e7fcc683e7
Closes-Bug: 1517225

Sync charmhelpers to get support for supplying a Ascii Armor PGP key to
openstack-origin (currently only supports Radix64)
Closes-Bug: 1518975

Sync charmhelpers to get fix for bug 1518975

shared secrets from other nodes (leader node).

The secret sharing previously worked because it used the peer storage
prior to leadership election due to the direct usage of relation_get
rather than using the retrieval methods provided by the peer storage
framework.

Closes Bug: LP #1541618

Update test combo definitions, remove Vivid deprecated release tests, update bundletester testplan yaml, update tests README.

In Mitaka, ceilometer-alarm-notifier and ceilometer-alarm-evaluator are
replaced by aodh-notifier and aodh-evaluator

      
In Mitaka, ceilometer-alarm-notifier and ceilometer-alarm-evaluator are
replaced by aodh-notifier and aodh-evaluator.

Remove precise check for not-always-present mongodb replset relation data;  Accomodate for ceilometer-agent-central process name differences on Liberty.