Fix TCP/UDP usage for rsyslog logging

- Introduce 'both' value for rsyslog server proto
- Make rsyslog server to listen both tcp and udp
- Fix wrong proto param usage for clients (clients
  should use $rservers hash instead)
- Change base rsyslog server proto to TCP

CI retest
Additional to: #1271176
Closes bug: #1276065

Change-Id: I3b13781a85a88dcb7d36edb54f5ad60c2f16c74b
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Merge "Fix TCP/UDP usage for rsyslog logging"