Update ep-unit-tests.sh to fix unit test error (CBD-1191)

Change-Id: I531a23ea83e59fe2f2531790ed9e6b5759cb2088
Reviewed-on: http://review.couchbase.org/33447
Reviewed-by: Philip Labee <philip@couchbase.com>
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Tested-by: Eric Limare <eric.limare@couchbase.com>