Remove incorrectly used "# flake8: noqa"
Remove incorrectly used "# flake8: noqa"

"# flake8: noqa" option disables all checks for the whole file.
To disable one line we should use "# noqa".
Remove unused "# flake8: noqa" and fix hidden hacking errors.

Change-Id: I624e96784ae7a22b5a5766f38bdf1fb8ade2d0a2
Closes-Bug: #1540254

openstack/python-heatclient