stubs and docs for management cmd renames

awx/main/management/commands/register_instance.py

@@ -0,0 +1,17 @@
+# Copyright (c) 2017 Ansible by Red Hat
+# All Rights Reserved
+
+# Borrow from another AWX command
+from awx.main.management.commands.provision_instance import Command as OtherCommand
+
+# Python
+import warnings
+
+
+class Command(OtherCommand):
+
+    def handle(self, *args, **options):
+        # TODO: delete this entire file in 3.3
+        warnings.warn('This command is replaced with `provision_instance` and will '
+                      'be removed in release 3.3.')
+        return super(Command, self).handle(*args, **options)