The OpenStack OCF resource definitions for Ceilometer have proven
to be quite brittle, and we can achieve much the same end by just
using the lsb module to track ceilometer-agent-central directly.

Drop all use of ocf:openstack and delete res_ceilometer_polling
which is a) broken for Pike and b) complete misnamed.  Configure
'lsb:ceilometer-agent-central' for all deployments irrespective
of release.

Change-Id: I7b02065cf245ae480c04d5db235866e879c14002
Closes-Bug: 1718830

All contributions to this charm where made under Canonical
copyright; switch to Apache-2.0 license as agreed so we
can move forward with official project status.

Change-Id: I15bca9b973b61e408e25c113035702a596c45268