Updated docstrings in /tools as per HACKING
Updated docstrings in /tools as per HACKING

Change-Id: I06db6653784eb298ef7f78ebe99865b9c635aade

hyakuhei/cleantox,emonty/oslo-hacking,zancas/hacking,openstack-dev/hacking,hyakuhei/cleantox,emonty/oslo-hacking,zancas/hacking,openstack-dev/hacking