Adds config options to limit image properties and members

This patch adds new options from:
  https://review.openstack.org/#/c/59563/2
  https://review.openstack.org/#/c/56981/8

Change-Id: I808938fa316d084d77fbafb72254d485e1be3e02
Closes-Bug: #1254645
Closes-Bug: #1257528
Merge "Adds config options to limit image properties and members"