def add_tags(jobflow_id, tags)
      params = {
        :operation => 'AddTags',
        :resource_id => jobflow_id,
        :tags => tags
      }
      aws_result = @aws_request.submit(params)
      yield aws_result if block_given?
    end
def add_tags(jobflow_id, tags)
      params = {
        :operation => 'AddTags',
        :resource_id => jobflow_id,
        :tags => tags
      }
      aws_result = @aws_request.submit(params)
      yield aws_result if block_given?
    end
Sets the specified tags on all instances in the specified jobflow

   emr.add_tags('j-123', [{:key => 'key1', :value => 'value1'}, {:key => 'key_only2'}])

 See http://docs.aws.amazon.com/ElasticMapReduce/latest/API/API_AddTags.html