Revert "samba-tool: moved takes_optiongroups definition to Command base class"

Revert "samba-tool: moved takes_optiongroups definition to Command base class"

This reverts commit f6fa8684896b8f3f9f8b7bd3742c99906973274c.

This keeps the main command class fairly slim, and makes it a bit
more obvious where the arguments to run() are coming from.

Conflicts:

	source4/scripting/python/samba/netcmd/__init__.py
	source4/scripting/python/samba/netcmd/domain.py
	source4/scripting/python/samba/netcmd/gpo.py
	source4/scripting/python/samba/netcmd/newuser.py
	source4/scripting/python/samba/netcmd/testparm.py
	source4/scripting/python/samba/netcmd/user.py
	source4/scripting/python/samba/tests/samba_tool/__init__.py