logerrit: Simplify SSH config

Change-Id: Ic8196ebfeef64270fcd42b44e485a2618472f184
Reviewed-on: https://gerrit.libreoffice.org/11788
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>