Controller kill using SIGKILL signal

Current Situation

the call

controller.sh kill

tries to normally terminate the Controller instance by sending the SIGTERM signal. Only if this is not successful then the Controller should be killed sending the SIGKILL. signal.

In case of normal termination, no fail-over will occur in a Controller Cluster.

Desired Behavior

the call

controller.sh kill

should killl the Controller instance sending the SIGKILL signal. As a result the fail-over operation should be performed in a Controller Cluster.