Correction for extension detail response sample

Added samples: src/wadls/compute-api/src/api_samples/all_extensions/extension-detail-get-resp.json
	       src/wadls/compute-api/src/api_samples/all_extensions/extension-detail-get-resp.xml
Modified: src/wadls/compute-api/src/os-compute-2.wadl
Fixes: bug 1098270

Change-Id: Id6a3166735bcf572711320d0b800c175c921cc99