Updated openstack/openstack
Project: openstack/keystone  5b1fa19e3f5af7b3c5c7419eec541da314ea3666
null
Restructure developing.rst

The "Developing with Keystone" file was incorrectly structured.

1) The "Building the Documentation" section was under the
"dogpile.cache based Key-Value-Store (KVS)" section, which it's
got nothing to do with.

2) The "Running Tests" section was under the "Initial Sample Data"
section, which it's got nothing to do with.

3) Several testing-related sections could be put under their own
"Testing" section to keep them together.

Change-Id: Icb0c63385d9ccc24b91d17e057e60346ce1a648e