For mysql with syslog, make local logs copy and provide rotation

For syslog mode, save a local copy of *all* mysql logs to /var/log/mysqld.log
and add it ro retation plans as well.
(Does not change remote logging headers)

Closes bug: #1275124

Change-Id: I322594fdf47329e914526168eda42f9dd16a3201
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Specify CIDR netmask for each VIP

Explicitly setting the netmask for each VIP works around a bug
in Pacemaker where an incorrect netmask is calculated. This
subsequently sets an incorrect broadcast address.

Change-Id: Icf208eff1be27765611500ae0e71ead122a7c4ce
Closes-bug: #1277614
Horizon performance tuning

Closes-Bug: #1277292

Some optimizations for Apache/WSGI settings aimed to improve
Apache and Horizon performance:
    - Apache MPM switched from 'prefork' to 'event' for RH-like
      systems
    - Apache/WSGI parameters configuration based on server's
      hardware

Change-Id: Idbd3ccaf05d9ad4a1e8206facece0c53a3fd90e7
Merge "For mysql with syslog, make local logs copy and provide rotation"
Merge "Specify CIDR netmask for each VIP"
Merge "Horizon performance tuning"