Acknowlege git.o.o as OpenStack's git server

OpenStack's cannonical git server is at git.o.o this patch
updates the index.rst to reflect that.

Change-Id: I54eeea7fab2e0f64ca9f23f7c328e2ff19721a41
Merge "Acknowlege git.o.o as OpenStack's git server"
Updated from global requirements

Change-Id: I744a629cf685760ad96d60654d081fc495024ea8