Add license header

While not strictly containing code (yet), add
a license header anyway to satisfy hacking check.

Change-Id: I9dc5b379bdf1c1307d72cd128f2a0be86ecd733f

ironic/api/config.py

@@ -1,3 +1,19 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# All Rights Reserved.
+#
+#    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.
+
 # Server Specific Configurations
 server = {
     'port': '6382',