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 sample tests and api samples for user-data
Partially implements blueprint v3-api-unittests
Partially implements blueprint v3-api-specification
Change-Id: I3a29490061632d7f728edcb942a061c3b65518bd
Chris Yeoh