tests/*server.py: remove pidfile on server termination

Avoid pidfile leaking/laying around after server already exited.

Reviewed-by: Daniel Stenberg
Closes #7506

tests/dictserver.py

@@ -188,5 +188,8 @@ if __name__ == '__main__':
         log.exception(e)
         rc = ScriptRC.EXCEPTION
 
+    if options.pidfile and os.path.isfile(options.pidfile):
+        os.unlink(options.pidfile)
+
     log.info("[DICT] Returning %d", rc)
     sys.exit(rc)

tests/negtelnetserver.py

@@ -364,5 +364,8 @@ if __name__ == '__main__':
         log.exception(e)
         rc = ScriptRC.EXCEPTION
 
+    if options.pidfile and os.path.isfile(options.pidfile):
+        os.unlink(options.pidfile)
+
     log.info("Returning %d", rc)
     sys.exit(rc)

tests/smbserver.py

@@ -391,5 +391,8 @@ if __name__ == '__main__':
         log.exception(e)
         rc = ScriptRC.EXCEPTION
 
+    if options.pidfile and os.path.isfile(options.pidfile):
+        os.unlink(options.pidfile)
+
     log.info("[SMB] Returning %d", rc)
     sys.exit(rc)