Keystone use common logging setup

The Keystone setup was using logging.conf to configure logging,
unlike other projects. This may have been left over from before
Keystone switched to oslo logging.

Switching to common logging configuration allows:
- Common format for logs for easier parsing
- Pretty colorized logs
- Keystone can control the default logging levels for libraries
  that are used by setting the defaults in keystone.
- Potentially using a function to setup logging for all components
  using oslo-logging (e.g., share with lib/nova).

Change-Id: I4e9b1e6cffce30f16a1e039224312852b8abda07
Closes-Bug: #1271775
Closes-Bug: #1269987
Add pidstat support

pidstat is a script that comes from sysstat, but will give us
per-process information.  Allow enabling "pidstat" that will run pidstat
to give info every 5 seconds by default.

Change-Id: I5ec7d5abce81125b55985bba3ccaf8073ccdfa2a
ERRORs in ceilometer-acentral log after succesful tempest run

recent merge added duplicate creation of ceilometer user. remove
ceilometer user creation from keystone_data so we can correctly add
ResellerAdmin role to ceilometer user which it needs to interact
with swift

Change-Id: I043c6b9337dfb147c3c8f364b462708a4030b41c
Closes-Bug: #1268730
Merge "Keystone use common logging setup"
Merge "ERRORs in ceilometer-acentral log after succesful tempest run"
Merge "Add pidstat support"
Merge branch 'master' of github.com:openstack-dev/devstack