Junos: close configuration in case configure_private is set to avoid …

…configure session to stay forever. (#1199)

This is done in commit_config  and discard_config functions.

Co-authored-by: Mircea Ulinic <mirceaulinic@users.noreply.github.com>

napalm/junos/junos.py

@@ -283,12 +283,16 @@ def commit_config(self, message=""):
         self.device.cu.commit(ignore_warning=self.ignore_warning, **commit_args)
         if not self.lock_disable and not self.session_config_lock:
             self._unlock()
+        if self.config_private:
+            self.device.rpc.close_configuration()
 
     def discard_config(self):
         """Discard changes (rollback 0)."""
         self.device.cu.rollback(rb_id=0)
         if not self.lock_disable and not self.session_config_lock:
             self._unlock()
+        if self.config_private:
+            self.device.rpc.close_configuration()
 
     def rollback(self):
         """Rollback to previous commit."""