Subagent start scripts should allow status checking and shutdown

Current Situation

• JS7 knows of Standalone Agents and Cluster Agents that include any number of Subagents.
• The agent.sh | agent.cmd start script
  • allows to check the status of a Subagent: ./agent.sh status
  • allows to shutdown a Subagent: ./agent.sh stop
• The functionality to check the status and to shutdown is available for Standalone Agents, it is not available for Subagents

Desired Behavior

• The start scripts used for Subagents offer the same functionality as for Standalone Agents to check the status and to shutdown a Subagent.