Refactor behaviors for glance v2

*Refactored create_new_image to account for all new image creations
*Removed register private image method
*Add list images method that accounts for pagination
*Updated summary documentation to be consistent throughout
*Added separate method for creating a list of new images
*Refactored create_new_image method to only return a single image
*Removed redundant addition of image to resources to be deleted
*Added get_member_ids method back in
*Removed count parameter from create_new_image method
*Updated created_new_image method to set image visibility to private when not passed
*Removed extra new lines for consistency

Change-Id: Ie63711a737d27667e2504ac488b7b8036d7f6a3f
Merge "Refactor behaviors for glance v2"