This adds the required "links" part of the version discovery document. Change-Id: I18e75116e1da47991d68b0842892f1036adec41a Story: 2001796 Task: 12518
Also fix an incorrect exposure of /healthmonitors on /pools and a badly ordered flow for member updates. Change-Id: Id256ea94293519b75983f7a44945ac9bbbf25cd1 Implements: blueprint member-put-list