According to Openstack summit session [1],
stestr is maintained project to which all Openstack projects should migrate.
Let's switch to stestr as other projects have already moved to it.
[1] https://etherpad.openstack.org/p/YVR-python-pti
Change-Id: I7dd587134d0047f8e18f1218d162dd5301fc732b
Goal is to maintain API specs in the specs repo for each project
and to eliminate the image-api repo.
Splits up original v2 API document into multiple files.
Change-Id: I7b6fbb1ee4a9a2e04395a7aa942d9ebdb011cc85