SCHEDULER-289 TCP-port should be available immediately for JobScheduler restart

Current Situation
After stopping the JobScheduler with JOC or with the start script (both will use the command <modify_spooler cmd='terminate'/>):

./bin/jobscheduler.sh stop

then the TCP port is not immediately available for re-use by JobScheduler.

netstat -na | grep 4444
tcp        0      0 127.0.0.1:44824         127.0.0.1:4444          TIME_WAIT   
tcp        0      0 127.0.0.1:44825         127.0.0.1:4444          TIME_WAIT

The ports are closed after the net.ipv4.tcp_fin_timeout settings in /etc/sysctl.conf

Desired Behavior
After termination of JobScheduler the ports are immediately available for a JobScheduler restart.
A JobScheduler restart shows no message "TCP-port ... blocked" in the JobScheduler log file.
The JobScheduler will re-use the port immediately after a restart.