fix(cinder): avoid failing if initiator field is missing on connection

Author: cardoe

python/cinder-understack/cinder_understack/dynamic_netapp_driver.py

@@ -412,7 +412,8 @@ def initialize_connection(self, volume, connector):
         """Initialize connection to volume."""
         # TODO: the nova ironic driver sends the field 'initiator' but the NetApp
         # cinder driver expects the field to be 'nqn' so copy the field over
-        connector["nqn"] = connector["initiator"]
+        if "initiator" in connector and "nqn" not in connector:
+            connector["nqn"] = connector["initiator"]
         with self._volume_to_library(volume) as lib:
             return lib.initialize_connection(volume, connector)