add cinder events

there are a few 'existence of' meters in cinder that we could
represent better as events. this patch adds them to the definition.

Change-Id: I69dc1c3eb98b9821c4febb021656d0e9ca78af2e
Partial-Bug: #1384874
Add oslo.concurrency module to tox --env genconfig

We have used oslo.concurrency module, which has defined two configuration
options 'disable_process_locking' and 'lock_path', this patch adds those
two options to generated ceilometer.conf

see: https://github.com/openstack/oslo.concurrency/blob/master/oslo_concurrency/lockutils.py#L40

Change-Id: Id6dc936932f8d2703975a76405c985359dd09c02
Merge "add cinder events"
Merge "Add oslo.concurrency module to tox --env genconfig"