Create image api does not show all required or optional attributes.

"name" and "metadata" only occurs in the example,
but they are not specified in the "Request parameters" section.
there is no doc to indicate that if them are required or optional.

Fix bug 1158134

Change-Id: Iacf6df91e4633a32a2c6b31b9d3d660299ad800a
Updated to 1.8.0 to add permalinks and jump menu to api-ref page

bug: #980228
bug: #1039163

Change-Id: I6a6d14c06ac1873303a5b6892d0923d36ff02a4b
author: Diane Fleming
Merge "Create image api does not show all required or optional attributes."
Adding image v2 API to api-ref page

bug: #1154343

Change-Id: I6e5e72860efa791b54bda5011f4e1ba9b04725e2
author: diane fleming