SEARCH-339: Split the interval set params in 2.

src/main/java/org/alfresco/service/cmr/search/IntervalSet.java

@@ -89,7 +89,14 @@ public class IntervalSet
             sb.append(" key="+label);
         }
         sb.append("}")
-        .append(startInclusive?"[":"(")
+          .append(toRange());
+        return sb.toString();
+    }
+
+    public String toRange()
+    {
+        StringBuilder sb = new StringBuilder("");
+        sb.append(startInclusive?"[":"(")
           .append(start)
           .append(","+end)
           .append(endInclusive?"]":")");