[INTERNAL] make sure Saros do not use internal auto reconnection

This patch is necessary to fix bugs #335 and #605. It ensures
that the same connection is used all the time.

Change-Id: Iafeb8050c74621c4d87f247214452cab0a352fc3
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/965
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>