skip window maximize test by default
skip window maximize test by default

I am getting very strange behavior with this test as I try to make it more reliable (I actually think there is a bug in chromedriver), so I propose that we just skip it by default.
DrMarcII/webdriver.dart,DrMarcII/webdriver.dart,bwu-dart-contributing/webdriver.dart,google/webdriver.dart,staats-google/webdriver.dart,google/webdriver.dart,DrMarcII/webdriver.dart,staats-google/webdriver.dart,bwu-dart-contributing/webdriver.dart,DrMarcII/webdriver.dart,google/webdriver.dart,bwu-dart-contributing/webdriver.dart,bwu-dart-contributing/webdriver.dart,staats-google/webdriver.dart,staats-google/webdriver.dart