Implement user-defined tenant for neutron nets

Default networks were previously hardcoded to use
"admin" as the tenant, regardless of user input.
This patch is a workaround because nailgun creates
neutron_config with admin tenant hardcoded as well.

FIXMEs were added to indicate what code needs cleanup
after nailgun is patched.

Change-Id: I272b53b6dbb4e972f94e82e81b58920351f4144d
Partial-Bug: #1267431
Mysql performance and disk optimization

1. Use per table innodb option
2. Use Barracuda file format

Change-Id: I42eaa51aa80853f609f34d8028eed32f1ec8a2dc
Partial-bug: #1278964
Fix rsyslog templates for Openstack logs

- use *_matched values for facilities in templates
- simplify stop processing condition

Closes-bug: #1263675

Change-Id: Ia87861605f3182d4fef7dece7942beb207e7582a
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Merge "Mysql performance and disk optimization"
Merge "Implement user-defined tenant for neutron nets"
Tune mysql, galera, sqlalchemy backend settings

- Tune MySQL config settings to be more clouds-specific (reads much
  more common, reads:writes rate is 10(100):1)
  * Limit innodb_buffer_pool_size to 10G
  * Reduce innodb_write_io_threads
  * Use sql_low_priority_updates
  * Raise FD imits to 102400, max connections, open tables limits etc.
- Tune SQLAlchemy backend settings for Openstack (QueuePool related)
- Sync some MySQL+galera class params for MySQL class as well

Closes-bug: #1274784
Implements blueprint: optimize-db-performance-at-scale

Change-Id: I0e843022f04f53150da52858280034aad6aee987
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>