Update and refactor images v2 client

*Updated create_image method due to image model refactor
*Reordered the list of methods so that they are grouped in a make that makes a little more sense
*Added summary documentation to all methods for consistency
*Remove new lines throughout to make the model more consistent
*Fixed alignment issues
*Added methods for get task and tasks schema

Change-Id: I13f9876e43eaa2e3999c8b1e44aa0d0f42904193
Merge "Update and refactor images v2 client"