Pretty print compute api-samples

Follow JSON formatting conventions to pretty-print JSON files.

This handles directory api-ref/src/wadls/compute-api/src/v2/api_samples/
only.

Change-Id: I9a068fc7d7e5c3366d9f2cf79a9de1605d5f4b90
Add note about protected properties for glance v1 and v2

Partial-Bug: #1219863

Change-Id: I063ffbcd0c906e7635c6b9323576c33cf4c678db
author: diane fleming
Merge "Pretty print compute api-samples"