Fix Region interface.

The value of the static MARKER_TYPE was probably being interprete as the
result of Long(getId()).
Rename DataQueryResourceService->DataQueryResource

For consistency with QueriesResource.
DataQueryResult: return Iterator inst/of Iterable

We don't want the query to be restartable.
Add close() to DataQueryResult
Renamed property in CommHighDimQueryConstraints

CommonHighDimensionalQueryConstraints::platform ->
CommonHighDimensionalQueryConstraints::platforms
Add session param to ::runACGHRegionQuery