Introduce hacking and solve all found issues

Change-Id: Ica586f27308a84a4911ef2754d7ae8852321055d

scripts/check_yaml_syntax.py

@@ -1,6 +1,20 @@
 #!/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
+
 import yaml
 
 sys.tracebacklimit = 0

scripts/get_hosts.py

@@ -1,5 +1,18 @@
 #!/usr/bin/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 yaml
 
 config = yaml.load(open('config.yaml'))

test-requirements.txt

@@ -4,7 +4,7 @@ ansible
 bashate
 doc8
 docutils
-flake8
+hacking
 oslosphinx
 pbr>=0.6,!=0.7,<1.0
 sphinx>=1.1.2,<1.2