Fix bad links out of the index
Fix bad links out of the index

Properly add the ".html" part of links to the user and contributor
indexes.

Change-Id: I4662d9fa8af9944952932ab06970df6b8f8b56f7
Closes-Bug: 1426135

mtougeron/python-openstacksdk,stackforge/python-openstacksdk,dudymas/python-openstacksdk,briancurtin/python-openstacksdk,dtroyer/python-openstacksdk,stackforge/python-openstacksdk,briancurtin/python-openstacksdk,mtougeron/python-openstacksdk,openstack/python-openstacksdk,openstack/python-openstacksdk,dudymas/python-openstacksdk,dtroyer/python-openstacksdk