rehome ovo exceptions

This patch rehomes the neutron.objects.exceptions to neutron-lib
under the same package/module structure. While this isn't an indication
of OVO coming into lib, one of these exceptions is needed in order to
sync neutron_lib.db.utils.is_retriable() with
0e6aea1553f5514e514163361223b4917545595f.

Change-Id: I2f6adec8628cff629a4e9df11caa76e37e16d10f

neutron_lib/objects/exceptions.py

@@ -0,0 +1,62 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo_utils import reflection
+
+from neutron_lib._i18n import _
+from neutron_lib import exceptions
+
+
+class NeutronObjectUpdateForbidden(exceptions.NeutronException):
+    message = _("Unable to update the following object fields: %(fields)s")
+
+
+class NeutronDbObjectDuplicateEntry(exceptions.Conflict):
+    message = _("Failed to create a duplicate %(object_type)s: "
+                "for attribute(s) %(attributes)s with value(s) %(values)s")
+
+    def __init__(self, object_class, db_exception):
+        super(NeutronDbObjectDuplicateEntry, self).__init__(
+            object_type=reflection.get_class_name(object_class,
+                                                  fully_qualified=False),
+            attributes=db_exception.columns,
+            values=db_exception.value)
+
+
+class NeutronDbObjectNotFoundByModel(exceptions.NotFound):
+    message = _("NeutronDbObject not found by model %(model)s.")
+
+
+class NeutronPrimaryKeyMissing(exceptions.BadRequest):
+    message = _("For class %(object_type)s missing primary keys: "
+                "%(missing_keys)s")
+
+    def __init__(self, object_class, missing_keys):
+        super(NeutronPrimaryKeyMissing, self).__init__(
+            object_type=reflection.get_class_name(object_class,
+                                                  fully_qualified=False),
+            missing_keys=missing_keys
+        )
+
+
+class NeutronRangeConstrainedIntegerInvalidLimit(exceptions.NeutronException):
+    message = _("Incorrect range limits specified: "
+                "start = %(start)s, end = %(end)s")
+
+
+class NeutronSyntheticFieldMultipleForeignKeys(exceptions.NeutronException):
+    message = _("Synthetic field %(field)s shouldn't have more than one "
+                "foreign key")
+
+
+class NeutronSyntheticFieldsForeignKeysNotFound(exceptions.NeutronException):
+    message = _("%(child)s does not define a foreign key for %(parent)s")

releasenotes/notes/rehome-ovo-exceptions-fbddfeea582ef3f1.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - The neutron versioned object exceptions from ``neutron.objects.exceptions``
+    are now available in ``neutron_lib.objects.exceptions``.