public void addPatternWithMaskComment(String patternStr, String maskComment) {
    patternsWithMaskComments.add(toPatternPair(patternStr, maskComment));
  }
Pattern to match and (partial) replacement text.
For example, {"transaction":76,"bucketid":8249877}.  We just want to mask 76 but a regex that
matches just 76 will match a lot of other things.
itests/util/src/main/java/org/apache/hadoop/hive/ql/QOutProcessor.java