Update pagination struct fields to conform with 20131202 API

As specified at http://docs.aws.amazon.com/kinesis/latest/APIReference/Welcome.html

ListStreamsResp needs a ["HasMoreStreams" parameter](http://docs.aws.amazon.com/kinesis/latest/APIReference/API_ListStreams.html#API_ListStreams_ResponseSyntax)

DescribeStreamResp needs a ["HasMoreShards" parameter](http://docs.aws.amazon.com/kinesis/latest/APIReference/API_DescribeStream.html#API_DescribeStream_ResponseSyntax)