[1.7.x] Fixed #22248 -- Made RenameModel reversible

Backport of cf7a2a000e from master

django/db/migrations/operations/models.py

@@ -106,8 +106,6 @@ class RenameModel(Operation):
     Renames a model.
     """
 
-    reversible = False
-
     def __init__(self, old_name, new_name):
         self.old_name = old_name
         self.new_name = new_name

docs/releases/1.7.2.txt

@@ -65,3 +65,6 @@ Bugfixes
 
 * Fixed :djadmin:`squashmigrations` to respect the  ``--no-optimize`` parameter
   (:ticket:`23799`).
+
+* Made :class:`~django.db.migrations.operations.RenameModel` reversible
+  (:ticket:`22248`)

tests/migrations/test_operations.py

@@ -433,8 +433,7 @@ class OperationTests(OperationTestBase):
             self.assertFKNotExists("test_rnmo_rider", ["pony_id"], ("test_rnmo_pony", "id"))
             self.assertFKExists("test_rnmo_rider", ["pony_id"], ("test_rnmo_horse", "id"))
         # And test reversal
-        with connection.schema_editor() as editor:
-            operation.database_backwards("test_rnmo", editor, new_state, project_state)
+        self.unapply_operations("test_rnmo", project_state, [operation])
         self.assertTableExists("test_rnmo_pony")
         self.assertTableNotExists("test_rnmo_horse")
         if connection.features.supports_foreign_keys: