Remove redundant args for clone_image method

Remove redundant args for clone_image method

The clone_image method takes both image_id and image_meta
as arguments.  No big deal, except the image id is included
in the image_meta; so there's really no reason to have both.

This patch removes the image_id argument and updates those
drivers that implement clone_image to extract the image ID
from the provided image_metadata.

Change-Id: Ibf3d3f7520f0e6d30081e98bdcbf1a07ebdb44ab