Merge branch 'jason/tests' into 'master'

...main/java/gov/usgs/earthquake/nshmp/netcdf/NshmGroup.java

...va/gov/usgs/earthquake/nshmp/netcdf/NshmNetcdfReader.java

.../usgs/earthquake/nshmp/netcdf/reader/BoundingHazards.java

...sgs/earthquake/nshmp/netcdf/reader/NetcdfCoordinates.java

.../gov/usgs/earthquake/nshmp/netcdf/reader/NetcdfUtils.java

...a/gov/usgs/earthquake/nshmp/netcdf/www/NetcdfService.java

...v/usgs/earthquake/nshmp/netcdf/NshmNetcdfReaderTests.java

...java/gov/usgs/earthquake/nshmp/netcdf/SiteClassTests.java

...usgs/earthquake/nshmp/netcdf/reader/NetcdfUtilsTests.java

src/test/resources/conus-test.nc

src/test/resources/invalid-netcdf-file.nc