- add utility to kill existing agent_gsm instance

src/agent_kill.py

@@ -0,0 +1,14 @@
+#!/usr/bin/python3
+
+import agent_config
+import os
+
+if __name__ == '__main__':
+    config = agent_config.AgentConfig()
+    if config.QualtestPID:
+        if config.QualtestPID.exists():
+            with open(config.QualtestPID, 'rt') as f:
+                pid = f.read().strip()
+                os.system(f'pkill {pid}')
+                
+