private static String valueToString(double value) {
    String returnStr = "" + value;
    return returnStr;
  }
Convert the given double to a String; if it is negative then flag it in the string
geode-lucene/src/distributedTest/java/org/apache/geode/cache/lucene/RebalanceWithRedundancyWithRegionCreatedBeforeReindexDUnitTest.java