Properly encode test case as UTF-8.

Change-Id: Id3a213079291e9855e8d968fc0b290413d7f413f
Reviewed-on: http://review.couchbase.org/27047
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Reviewed-by: Deepti Dawar <dawardeepti@gmail.com>