Remove stale nested backport from InstancePCIRequests

Sometime in 2015, we removed the hard-coded obj_relationships mapping
from parent objects which facilitated semi-automated child version
backports.  This was replaced by a manifest-of-versions mechanism
where the client reports all the supported objects and versions
during a backport request to conductor. The InstancePCIRequests object
isn't technically an ObjectListBase, despite acting like one, and thus
wasn't using the obj_relationships. Because of this, it was doing
its own backporting of its child object, which was not removed in
the culling of the static mechanism. Because we now no longer need to
worry about sub-object backport chaining, when version 1.2 was added,
no backport rule was added, and since the object does not call the
base class' generic routine, proper backporting of the child object
was not happening.

All we need to do is remove the override to allow the base
infrastructure to do the work.

Change-Id: Id610a24c066707de5ddc0507e7ef26c421ba366c
Closes-Bug: #1868033

Author: kk7ds

nova/objects/instance_pci_requests.py

@@ -82,14 +82,6 @@ class InstancePCIRequests(base.NovaObject,
         'requests': fields.ListOfObjectsField('InstancePCIRequest'),
     }
 
-    def obj_make_compatible(self, primitive, target_version):
-        target_version = versionutils.convert_version_to_tuple(target_version)
-        if target_version < (1, 1) and 'requests' in primitive:
-            for index, request in enumerate(self.requests):
-                request.obj_make_compatible(
-                    primitive['requests'][index]['nova_object.data'], '1.0')
-                primitive['requests'][index]['nova_object.version'] = '1.0'
-
     @classmethod
     def obj_from_db(cls, context, instance_uuid, db_requests):
         self = cls(context=context, requests=[],

nova/tests/unit/objects/test_instance_pci_requests.py

@@ -99,20 +99,6 @@ def test_get_by_instance_legacy(self):
         self.assertEqual('alias_2', requests.requests[1].alias_name)
         self.assertTrue(requests.requests[1].is_new)
 
-    def test_backport_1_0(self):
-        requests = objects.InstancePCIRequests(
-            requests=[objects.InstancePCIRequest(count=1,
-                                                 request_id=FAKE_UUID),
-                      objects.InstancePCIRequest(count=2,
-                                                 request_id=FAKE_UUID)])
-        primitive = requests.obj_to_primitive(target_version='1.0')
-        backported = objects.InstancePCIRequests.obj_from_primitive(
-            primitive)
-        self.assertEqual('1.0', backported.VERSION)
-        self.assertEqual(2, len(backported.requests))
-        self.assertFalse(backported.requests[0].obj_attr_is_set('request_id'))
-        self.assertFalse(backported.requests[1].obj_attr_is_set('request_id'))
-
     def test_obj_from_db(self):
         req = objects.InstancePCIRequests.obj_from_db(None, FAKE_UUID, None)
         self.assertEqual(FAKE_UUID, req.instance_uuid)