Type for component stats transported via adminport.

Change-Id: I4bf8491de2cc28dfd585fead99382fd7f94a8b3f
Reviewed-on: http://review.couchbase.org/36135
Reviewed-by: John Liang <johliang00@gmail.com>
Reviewed-by: Deepkaran Salooja <deepkaran.couchbase@gmail.com>
Reviewed-by: Pratap Chakravarthy <prataprc@couchbase.com>
Tested-by: Pratap Chakravarthy <prataprc@couchbase.com>