add wsgi2_test.py

greentest/wsgi2_test.py

+import sys
+from gevent import wsgi2
+from wsgi_test import *
+
+del TestHttps, TestChunkedApp, TestBigChunks
+
+TestCase.get_wsgi_module = lambda *args: wsgi2
+
+if __name__ == '__main__':
+    greentest.main()