Updated openstack/openstack
Project: openstack/keystone  704b66962f19a5a1e2d317c85689308078bfba30

Capitalize all instances of Keystone in the docs

There were quite a few instances of `keystone` where `Keystone`
should have been used. Code examples were not changed, since that
would break things.

Change-Id: I533ad1b71cc3af1b70bb54cca0a820aaad3f62da