Updated doc support for Hosts API

Modified file: src/wadls/compute-api/src/ext/os-hosts.wadl
Linked the new samples located in the api_samples folder.
Also removed the optional att from the "status" and "maintenance_mode" params
since not providing them will cause an error.

Change-Id: I2d5fde44e4b1bf27a91b84c3fb6caf5c34ddfd1d
Add support for Cloudpipe-update API extension

Modified  api-ref/src/wadls/compute-api/src/ext/os-cloudpipe.wadl
Fixes: bug 1078313

Change-Id: I807b0a797b63372a2e0840108f9fd3c0b55a5ab7
Merge "Updated doc support for Hosts API"
Merge "Add support for Cloudpipe-update API extension"