PEP8 on the doc and elements files

ensure the Python scripts in the doc and elements directories are PEP8
compliant.

test_os_svc_daemon.py test is fixed in another patch:
  I9b1859f9fc5846c7c42606644231105618e1a1a0.

Change-Id: If5068ef77d6643c19de36bfcf4b4bf790f86b538
Merge "PEP8 on the doc and elements files"