Apply minidom patch to Python prior to 2.7.3

Change-Id: Icf5c45de4347b0e6e13a08665d7c5ba6f055712f
Sync tools/*-requires with openstack/requirements.

* sphinxcontrib-httpdomain is now included to the opentstack/requirements

Change-Id: I2f8f870db915cf8a846791e46386c6cf23ac0908
Merge "Sync tools/*-requires with openstack/requirements."