sysconfig: Fixed an performance issue with rc.status

This update fixes the following issue with sysconfig:
- bnc#859360: A systemctl status is quite expensive as it (by default) parses logs, etc. Use is-active where we need the code only. This fixes an performance issue with rc.status

Fixed bugs
bnc#859360
rc.status performance regression due to systemd integration
Selected Binaries
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