[all] Added toString() tests also for implements Dynamic classes


git-svn-id: http://haxe.googlecode.com/svn/trunk@6200 f16182fa-f095-11de-8f43-4547254af6c6
[java] unit tests-related fixes


git-svn-id: http://haxe.googlecode.com/svn/trunk@6201 f16182fa-f095-11de-8f43-4547254af6c6