This patch changes 'image_ref'/'flavor_ref' to 'imageRef'/'flavorRef'
that same with v2 api. And also change the related unittest.
The differences between v2 and v3 are described on the wiki page
https://wiki.openstack.org/wiki/NovaAPIv2tov3.
Partially implements blueprint v2-on-v3-api
Change-Id: Ic17334e0a9de89488d5e0c8b75950027d51a3cd4
Removes occurences of the personality extension from the V3 API
samples as the extension has been removed. Cleanup of consistency
of image and flavor ref examples for the api samples.
DocImpact
Partially implements blueprint v3-api-remove-extensions
Change-Id: I43a34097904d3d7e280039c3d5d76479a49e92d0
Adds V3 API samples for cells and multinic extensions.
Bundling them together to save on review load
Partially implements blueprint v3-api-unittests
Partially implements blueprint v3-api-specification
Change-Id: I50840b3d900fbc8ff4f655e4188cc886d7065729
He Jie Xu