Glance API V2 can't recognize parameter 'id'

Based on current implement, API V2 is using **id** in image schema,
but using **image_id** for most of the internal functions as key
word arguments. So user will got a key error if using:

glance --os-image-api-version 2 image-create --id <id>

This patch will map 'id' to 'image_id' in RequestDeserializer and
add an unit test case fo the change.

Closes-Bug: 1366515

Change-Id: I4c72881a7ada728307e806776426b42cf4cf0993
Merge "Glance API V2 can't recognize parameter 'id'"