SYDNEY (Reuters) - New Zealand Green Party leader James Shaw said on Thursday he was confident of reaching an agreement with Labour and New Zealand First to provide support for the formation of a coalition government.  Shaw said a final decision would be made on Thursday evening and he was  very confident  of a change in government after nearly a decade of center-right National governments.  The incoming Labour-New Zealand First coalition needs the Greens to commit to a confidence and supply agreement in parliament to ensure they have a majority.     