[JS-1551] JobScheduler Agent maintains a list of running tasks - SOS JIRA

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Implementation

The Agent creates a file with the name kill_tasks_after_crash_<port>(.sh|.cmd) in the logs folder with <port> being the number of the port that the Agent listens to.
- For every task running on the Agent one line is added to this file that includes a call to the kill script:
```
"${SCHEDULER_HOME}/bin/jobscheduler_agent_kill_task.sh|.cmd" -kill-agent-task-id=<Agent Task ID>
```
- Parameters
  - Agent Task ID
- Example
```
"${SCHEDULER_HOME}/bin/jobscheduler_agent_kill_task.sh" -kill-agent-task-id=123456781
```
For every task terminating its entry is removed from the running tasks list.
Should an Agent crash then the running tasks list will contain one line for each running task and will be executed by the Agent start script (~~JS-1552~~)

is related to

JS-1574 Agent crash kill script hands over masters's task ID and job path

is required by

JS-1550 Tasks should terminate in case of JobScheduler Agent crash

JS-1552 Agent start script executes a shell script to kill running tasks in case of a JobScheduler Agent crash

relates to

JS-1468 OS-specific kill for JobScheduler Universal Agent Tasks without monitor

JS-1572 Agent provides master job path and task ID