Use correct Object to support ordering

[Thalmann]

In the Python 2 version mx/literal.py contains this:

from suds import *
from suds.mx import *

And mx/init.py contains this:

from suds.sudsobject import Object
So in the end it will be suds.sudsobject.Object which gets used.

In the Python 3 version init.py has introduced this:

class Object(object):
    """
    The python 3 base Object
    """
    pass

And mx/literal.py now instead has this:

from suds import TypeNotFound, Object
So indeed it is importing the wrong Object class in Python 3.

[Thalmann]

@cackharot Can you take a look at this one?