Point/Station featureCollections don't use ncml

[tdrwenski]

Ncml in featureCollections is not used or tested. The issue is probably in the DatasetManager::openNetcdfFile and DatasetManager::openCoverageDataset. We should add integration tests for both cases, e.g. through WMS/ opendap and opening as a coverage through NCSS. Check that both metadata and data changes work with ncml (e.g. renaming a variable and applying an enhancement such as the Standardizer).

See the featureCollection documentation:

NcML is no longer used to define the collection, but it may still be used to modify the feature collection dataset for FMRC or Point (not GRIB).

I have manually tested featureType=FMRC, and that does seem to work with NcML. And the above says it should not work with GRIB1/GRIB2. Ncml does not seem to work with featureType=Point or featureType=station, so either that needs to be fixed or the documentation should be updated.