[Trivial] Remove executable privilege of doc/source/conf.py
[Trivial] Remove executable privilege of doc/source/conf.py

It is a configuration file, rather than a script.

Change-Id: Iae0428eb089fdc929282eefb440aeff107ba8666

stackforge/senlin,openstack/senlin,openstack/senlin,stackforge/senlin,openstack/senlin