VNX Driver: delete_hba() instead of remove_hba()

The storops drivers doesn't have a remove_hba() function,
it's called delete_hba(). The confusion comes from the fact
that storops uses -removeHBA argument when calling
naviseccli.

Change-Id: I3f72481442436ddf78c10ab53c161663b05a330a
Closes-bug: #1813525
(cherry picked from commit 6145f8583a)
(cherry picked from commit acca9dbc7c)

cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_vnx.yaml

@@ -2067,7 +2067,7 @@ test_terminate_connection_cleanup_deregister:
       get_alu_hlu_map: {}
   vnx:
     _methods:
-      remove_hba:
+      delete_hba:
 
 test_terminate_connection_cleanup_sg_is_not_empty:
   sg:

cinder/tests/unit/volume/drivers/dell_emc/vnx/test_adapter.py

@@ -994,9 +994,9 @@ class TestCommonAdapter(test.TestCase):
         host = common.Host('fake_host', ['fake_initiator1', 'fake_initiator2'])
         sg = mocked_res['sg']
         common_adapter.terminate_connection_cleanup(host, sg)
-        common_adapter.client.vnx.remove_hba.assert_any_call(
+        common_adapter.client.vnx.delete_hba.assert_any_call(
             'fake_initiator1')
-        common_adapter.client.vnx.remove_hba.assert_any_call(
+        common_adapter.client.vnx.delete_hba.assert_any_call(
             'fake_initiator2')
 
     @res_mock.patch_common_adapter

cinder/volume/drivers/dell_emc/vnx/client.py

@@ -535,7 +535,10 @@ class Client(object):
         if not isinstance(initiators, list):
             initiators = [initiators]
         for initiator_uid in initiators:
-            self.vnx.remove_hba(initiator_uid)
+            try:
+                self.vnx.delete_hba(initiator_uid)
+            except AttributeError:
+                self.vnx.remove_hba(initiator_uid)
 
     def update_consistencygroup(self, cg, lun_ids_to_add, lun_ids_to_remove):
         lun_ids_in_cg = (set([l.lun_id for l in cg.lun_list]) if cg.lun_list