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.

update identity-notifications relation data inspection to validate data which may vary based on hook timing;  add debug output