HBASE-24775 [hbtop] StoreFile size should be rounded off (#2144)

Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Viraj Jasani <vjasani@apache.org>

hbase-hbtop/src/main/java/org/apache/hadoop/hbase/hbtop/field/FieldValue.java

@@ -175,9 +175,12 @@ public final class FieldValue implements Comparable<FieldValue> {
       case INTEGER:
       case LONG:
       case FLOAT:
-      case SIZE:
         return value.toString();
 
+      case SIZE:
+        Size size = (Size) value;
+        return String.format("%.1f", size.get()) + size.getUnit().getSimpleName();
+
       case PERCENT:
         return String.format("%.2f", (Float) value) + "%";