s3select: align s3-tests with new changes in s3select
s3select: align s3-tests with new changes in s3select

Fix when then, date functions and NULL, add escape, trim tests

Signed-off-by: Albin Antony <fe64f498dc39ba9152a63401e95b30c3158c740b@redhat.com>

ceph/s3-tests,ceph/s3-tests