Explicitely add license information to code files

Following OpenStack conventions, let's add a license header to
all code files.

Change-Id: Ia1992f3e8aba45e96cff6482613ec50df4fca980

autogenerate-config-docs/autohelp.py

@@ -1,4 +1,15 @@
 #!/usr/bin/env python
+# 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.
 #
 # A collection of tools for working with flags from OpenStack
 # packages and documentation.

autogenerate-config-docs/common.py

@@ -1,6 +1,18 @@
 #
 # A collection of shared functions for managing help flag mapping files.
 #
+# 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.config import cfg
 

autogenerate-config-docs/extract_swift_flags.py

@@ -1,4 +1,17 @@
 #!/usr/bin/env python
+#
+# 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.
+
 import sys
 from os import path
 import glob

cleanup/remove_trailing_whitespaces.sh

@@ -2,7 +2,18 @@
 
 ## copyright: B1 Systems GmbH   <info@b1-systems.de>,    2013.
 ##    author: Christian Berendt <berendt@b1-systems.de>, 2013.
-##   license: Apache License, Version 2.0
+
+# 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.
 
 # Call ./tools/cleanup/remove_trailing_whitespaces.sh in the
 # root of openstack-manuals.

cleanup/remove_unnecessary_spaces.py

@@ -2,7 +2,18 @@
 
 ## copyright: B1 Systems GmbH   <info@b1-systems.de>,    2013.
 ##    author: Christian Berendt <berendt@b1-systems.de>, 2013.
-##   license: Apache License, Version 2.0
+
+# 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.
 
 # Call ./tools/cleanup/remove_unnecessary_spaces.py in the
 # root of openstack-manuals.

os_doc_tools/doctest.py

@@ -1,4 +1,17 @@
 #!/usr/bin/env python
+
+# 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.
+
 '''
 
 Usage: