PROBLEM: mosquitto broker still running
PROBLEM: mosquitto broker still running

system () invokes subshell so we were killing process what was not
mosquitto
SOLUTION: Kill the correct process.

Signed-off-by: Karol Hrdina <937bdb07aaf2c964fab70643806e4fa360d51c54@Eaton.com>

ZMQers/zmosq,vyskocilm/zmosq,karolhrdina/zmosq,ZMQers/zmosq,karolhrdina/zmosq,vyskocilm/zmosq