Using Python not-so-new-anymore-style classes for enums

This change simply bases all enums off of the base class "object" in the python API.
 Turning enums into python 'new style classes'

Here's a simple description:
http://realmike.org/blog/2010/07/18/introduction-to-new-style-classes-in-python/

Example change in output of Core.py:

    class KalturaAssetParamsDeletePolicy:

Becomes:

    class KalturaAssetParamsDeletePolicy(object):