[REFACTOR] Complete refactoring of commit 54d04ed

In 54d04ed the variable "sarosNet" was renamed to "connectionService"
only in class "Saros".
This patch continues wiping out the old name.
Now the only references left are deprecated calls of
"Saros.getSarosNet()", which are to be removed in another patch.

Change-Id: I4b3c2ada3f4428455c57e9f5960be25ea3e8be6a
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1451
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>