Update QXmlQuery test result after default date format change.

QTime is not showing milliseconds by default anymore, when converted to
QString.

Change-Id: Iba745919ee1f034aebc75628a96efad5546f03c1
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>

tests/auto/qxmlquery/pushBaselines/allAtomics.ref

 startOfSequence()
 atomicValue(xs:untypedAtomic)
-atomicValue(2002-10-10T23:02:11.000Z)
+atomicValue(2002-10-10T23:02:11Z)
 atomicValue(2002-10-10)
 atomicValue()
 atomicValue()