Support for M6 machines

[dipeshsharma]

Using this SDK with an M6 machine (model: UCSC-C240-M6SX) with firmware version 4.2(3b) is giving following error:

File "/usr/local/lib/python3.10/site-packages/imcsdk/imchandle.py", line 152, in login
return self._login(auto_refresh=auto_refresh, force=force, timeout=timeout)
  File "/usr/local/lib/python3.10/site-packages/imcsdk/imcsession.py", line 593, in _login
raise ImcLoginError("Not a supported server.")
imcsdk.imcexception.ImcLoginError: Not a supported server.