CBQE-2345: n1ql: new date tests

Change-Id: Ia47ccaa1d1caec41fe47864c2dfba0906d481ec1
Reviewed-on: http://review.couchbase.org/40882
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>