Ensure that host response check is only performed when using o5logon.

Author: anthony-tuininga

src/oracledb/impl/thin/messages/auth.pyx

@@ -222,7 +222,8 @@ cdef class AuthMessage(Message):
  self.session_data[key] = value
  if self.function_code == TNS_FUNC_AUTH_PHASE_ONE:
  self.function_code = TNS_FUNC_AUTH_PHASE_TWO
- elif not self.change_password:
+ elif not self.change_password \
+ and self.conn_impl._combo_key is not None:
  response = None
  value = self.session_data.get("AUTH_SVR_RESPONSE")
  if value is not None: