Changed the way to open a new window or tab in TransactionTokenTest. #20

Please review #20 , and merge to master branch.

Browser of confirmed the operation is following.
* Firefox 27.0.1(Mac+Windows) / 24.2.0(CentOS)
* Chrome 32.0.1700(Mac+Windows)

[note]
* Internet Explorer(10/11) does not work. If target browser is Internet Explorer, skip some test cases.(not confirmed the version of 9 or less)