Bug in FieldStats indices request when LessThanOrEqualTo comparison is used on an IndexConstraint

[cigma29]

Using the LessThanOrEqualTo comparison filter on an IndexContraint of a FieldStats indices request will create a low-level API request with a GreaterThanOrEqualTo comparison instead.

You can see this at line 79 of Nest/Search/FieldStats/IndexConstraint.cs

public IndexConstraintComparisonDescriptor LessThanOrEqualTo(string lte) => Assign(a => a.GreaterThanOrEqualTo = lte);

[gmarz]

Thanks for reporting this @cigma29 👍