BatchSpawnerBase: Store ip, port in self.server after connect_to_job

This is required since data may change after the connect_to_job function.

Author: olifre

batchspawner/batchspawner.py

@@ -588,6 +588,11 @@ async def start(self):
         if self.connect_to_job_cmd:
             await self.connect_to_job()
 
+        # Port and ip can be changed in connect_to_job, push out to jupyterhub.
+        if self.server:
+            self.server.port = self.port
+            self.server.ip = self.ip
+
         self.db.commit()
         self.log.info(
             "Notebook server job {0} started at {1}:{2}".format(