Support HAVING criteria on HibernateCriteriaBuilder

  def commentsByUserAndArticle = Comment.createCriteria().list {
    projections {
      countDistinct('id', 'commentCount')
      groupProperty('userAccount')
      groupProperty('article')
      having {
       gt('commentCount', 5)
      }
    }
    order('commentCount', 'desc')
  }

  def commentsByUserAndArticle = Comment.executeQuery(
            "select count(c.id), c.userAccount, c.article \
          from my.domain.Comment c \
          group by c.userAccount, c.article \
          having count(c.id) > :abuseIndicator \
          order by count(c.id) desc",
            ["abuseIndicator":5L])