Update AggregationTests.filterShouldBeAppliedCorrectly to use non-deprecated method [DATAMONGO-1606]

[spring-projects-issues]

Amy Aldredge opened DATAMONGO-1606 and commented

Trying to figure out the correct syntax for aggregation framework project filter using AggregationExpression over the deprecated AggregationFunctionExpressions is difficult without an example.

The following seems to be the correct syntax to do the equivalent operation (line 1503/1504)

TypedAggregation<Sales> agg = newAggregation(Sales.class, project().and("items")
				.filter("item", ComparisonOperators.Gte.valueOf("item.price").greaterThanEqualToValue(100)).as("items"));

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Affects: 1.10 GA (Ingalls)