[ALS-4954] Fix continuous visualizations not showing bar when all val…

…ues are the same (#136)

* [ALS-4771] Add common area UUID to query

- When the GIC common area makes a federated query request to
the institute nodes, it passes a UUID for the query
- This UUID is to be used in later development as a unifying,
interinstitutional identifier for stuff like data sharing

- Add query UUID to QueryRequest
  - Make QueryRequest ignore unknown fields for backwards compatability
- Add UUID to query meta in passthrough
- Sanity test for missing UUID jackson stuff

* If keys are the same return 1 not 0

pic-sure-resources/pic-sure-visualization-resource/src/main/java/edu/harvard/hms/dbmi/avillach/resource/visualization/service/DataProcessingService.java

@@ -126,6 +126,7 @@ private static int calcNumBins(Map<Double, Integer> countMap) {
         DescriptiveStatistics da = new DescriptiveStatistics(keys);
         double smallestKey = da.getMin();
         double largestKey = da.getMax();
+        if (smallestKey == largestKey)  return 1;
         double binWidth = (3.5 * da.getStandardDeviation()) / Math.pow(countMap.size(),THIRD);
         return (int)Math.round((largestKey - smallestKey) / binWidth);
     }