Bugfix to KingInferenceStep and pedigree

Author: bbimber

SequenceAnalysis/api-src/org/labkey/api/sequenceanalysis/pipeline/VariantProcessingStep.java

@@ -88,7 +88,7 @@ default String getDemographicsProviderName(PipelineStepProvider<?> provider, Pip
             return provider.getParameterByName(PedigreeToolParameterDescriptor.NAME).extractValue(job, provider, stepIdx, String.class);
         }
 
-        default DemographicsProvider getDemographicsProvider(PipelineStepProvider<?> provider, PipelineJob job, int stepIdx)
+        default @Nullable DemographicsProvider getDemographicsProvider(PipelineStepProvider<?> provider, PipelineJob job, int stepIdx)
         {
             if (PipelineJobService.get().getLocationType() != PipelineJobService.LocationType.WebServer)
             {

SequenceAnalysis/src/org/labkey/sequenceanalysis/run/variant/KingInferenceStep.java

@@ -31,14 +31,14 @@
 import java.util.ArrayList;
 import java.util.List;
 
-public class KingInferenceStep extends AbstractCommandPipelineStep<KingInferenceStep.KingWrapper> implements VariantProcessingStep, VariantProcessingStep.RequiresPedigree
+public class KingInferenceStep extends AbstractCommandPipelineStep<KingInferenceStep.KingWrapper> implements VariantProcessingStep
 {
     public KingInferenceStep(PipelineStepProvider<?> provider, PipelineContext ctx)
     {
         super(provider, ctx, new KingInferenceStep.KingWrapper(ctx.getLogger()));
     }
 
-    public static class Provider extends AbstractVariantProcessingStepProvider<KingInferenceStep>
+    public static class Provider extends AbstractVariantProcessingStepProvider<KingInferenceStep> implements VariantProcessingStep.SupportsPedigree
     {
         public Provider()
         {