Removed ceilometer references

Ceilometer has its own cookbook `openstack-metering`.  Removing
ceilo from this cookbook to ensure we focus our efforts on the
new cookbook.  I have yet to perform integration testing on
the metering cookbook, but I imagine things should be in working
order as we all begin to use it.

Change-Id: I0bc5dd3591d9686b5cf7dd7046f0b1d7436ca2fd
Merge "Removed ceilometer references"