Replace old http links with the newest https ones in docs
Replace old http links with the newest https ones in docs

Change-Id: I3524a210a8b5d2146378de9f9d88a46b2d7232cb

openstack/python-openstacksdk,stackforge/python-openstacksdk,dtroyer/python-openstacksdk,stackforge/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk