Remove useage of old os-api-ref version and replace with current version.
Follow other repositories and merge v1 and v2 in a single document.
Note that we need to have a single document so that preview of the
document works properly in our CI.
Change-Id: I82c8b9ca317298b3dc1f7133ce8c0e9b3503730d
f589c6e2d1