MB-7656 Move json collator to src/views/

So that all view related code is clearly separated
from database related code.

Change-Id: Ibc9e48c8f6ee71c2283a11427d8c97d2f72e9860
Reviewed-on: http://review.couchbase.org/24420
Reviewed-by: Aaron Miller <apage43@ninjawhale.com>
Tested-by: Aaron Miller <apage43@ninjawhale.com>
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Filipe David Borba Manana <fdmanana@gmail.com>