#292 Stopping ProxySQL pings __after__ gdb has finished running

Otherwise, it won't have the chance to ping the server and detect it's
waiting for GDB to finish (and interact with the user) while the proxy
process is crashed.

test/proxysql_base_test.py

@@ -202,9 +202,13 @@ class ProxySQLBaseTest(TestCase):
 
 	@classmethod
 	def tearDownClass(cls):
-		cls._stop_proxysql_pings()
 		if cls.INTERACTIVE_TEST:
 			cls._gdb_process.wait()
+		# It's essential that pings are stopped __after__ the gdb process has
+		# finished. This allows them to keep pinging ProxySQL in the background
+		# while it's stuck waiting for user interaction (user interaction needed
+		# in order to debug the problem causing it to crash).
+		cls._stop_proxysql_pings()
 		cls._shutdown_docker_services()
 	
 	def run_query_proxysql(self, query, db, return_result=True,