[STF] corrected SubscriptionManager text entry

Change-Id: I8c0c8257d641f1cd0f40ddc710f06eea00f0b0e0
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1196
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>