Upgrade SPY to 2.10.3

Change-Id: I65097bf0e5f04e3e08fa8d3d994943445f4de1e8
Reviewed-on: http://review.couchbase.org/30779
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>