Handle singleton site class dimension

The index for site class is now only added to the shape and origin vectors if there are more than one site classes.

Resolves #61 (closed)

src/hazard/src/main/java/gov/usgs/earthquake/nshmp/netcdf/reader/BoundingReaderHazardCurves.java

@@ -125,23 +125,23 @@ public class BoundingReaderHazardCurves extends BoundingReader<StaticDataHazardC
         var imt = netcdfData.imts().get(iImt);
 
         // origin array builder, e.g [0, imt, siteClass]
-        var origin_builder = netcdf.netcdfShape().buildShape()
+        var originBuilder = netcdf.netcdfShape().buildShape()
             .add(IndexKey.IML, 0)
             .add(IndexKey.IMT, iImt);
 
         // shape array builder, e.g. [nIML, 1, 1]
-        var shape_builder = netcdf.netcdfShape().buildShape()
+        var shapeBuilder = netcdf.netcdfShape().buildShape()
             .add(IndexKey.IML, netcdfData.nIml())
             .add(IndexKey.IMT, 1);
 
         // Only add index for siteClass if this is not a singleton dimension
         if (netcdfData.siteClasses().size() > 1) {
-          origin_builder.add(IndexKey.SITE_CLASS, iSiteClass);
-          shape_builder.add(IndexKey.SITE_CLASS, 1);
+          originBuilder.add(IndexKey.SITE_CLASS, iSiteClass);
+          shapeBuilder.add(IndexKey.SITE_CLASS, 1);
         }
 
-        var origin = origin_builder.reduce().build();
-        var shape = shape_builder.reduce().build();
+        var origin = originBuilder.reduce().build();
+        var shape = shapeBuilder.reduce().build();
 
         try {
           var xySequence = XySequence.create(