Fix puppet logs tags in rsyslog template

- add puppet-error tag
- use strict '==' (faster) instead of 'contains'
- del unnecessary rsyslog::imfile 20-puppet*.conf templates

Closes-bug: #1275121

Change-Id: I58afae3ae220dc437f23670796526e67d2f8a3b3
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Merge "Fix puppet logs tags in rsyslog template"