[CBD-1191]: Initial checkin for platform commit validation script.

Change-Id: I8bcba5314ff2805b1a45acfc66507dc3e9cfd7b7
Reviewed-on: http://review.couchbase.org/34362
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Tested-by: Eric Limare <eric.limare@couchbase.com>
Reviewed-by: Sundararaman Sridharan <sundar.sridharan@gmail.com>