This patch fixes the following:
* The description says, "Here, a subset of metadata items
are presented within the image." This is a server sample,
not an image.
* The sample itself has the wrong id in the "self" link and
there are no metadata_links with a server object (probably
a carry over from an image docs sample).
Change-Id: Idb1e5243d6d072e020e1532bec603e5cd219702e
Closes-Bug: #1737854