green.ssl: Set suppress_ragged_eofs default based on SSLSocket defaults

Error: `EOF occurred in violation of protocol (_ssl.c:2570)` in some HTTPS `connection: close` scenario.

This is a result of suppress_ragged_eofs defaulting to True in SSLSocket, but defaulting to None in GreenSSLSocket when monkey_patched. This only occurs in Python 3.7+.

#695

eventlet/green/ssl.py

@@ -70,7 +70,7 @@ def __new__(cls, sock=None, keyfile=None, certfile=None,
                         sock=sock.fd,
                         server_side=server_side,
                         do_handshake_on_connect=False,
-                        suppress_ragged_eofs=kw.get('suppress_ragged_eofs'),
+                        suppress_ragged_eofs=kw.get('suppress_ragged_eofs', True),
                         server_hostname=kw.get('server_hostname'),
                         context=context,
                         session=kw.get('session'),