Ensure usage of upstream ceilometer-agent-central ocf (monitors amqp port).
Note: previous versions unintentionally used a modified version of the ocf
resource file which monitored keystone connections.

Adds support for identity-notifications interface

value not being set prior to being used.

of a mongodb server.

Synced charm-helpers

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modified:
  ocf/openstack/ceilometer-agent-central*

elected leader resource rather than calculating the vip resource.

dudes running or the counts will not be accurate.

- Add support for shared secret for ceilometer's signed messages
- Refactor MongoDBContext to be a bit more clean
- Specify replicaSet and readPreference parameters in the mongodb url

when the primary becomes unavailable.

for high availability.