import OrderedDict backport by Raymond Hettinger

http://code.activestate.com/recipes/576693-ordered-dictionary-for-py24/

Documentation:
http://docs.python.org/2/library/collections.html#collections.OrderedDict

Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
import namedtuple backport by Raymond Hettinger

http://code.activestate.com/recipes/500261-named-tuples/

Documentation:
http://docs.python.org/2/library/collections.html#collections.namedtuple

Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
import defaultdict backport by Jason Kirtland

http://code.activestate.com/recipes/523034-emulate-collectionsdefaultdict/

Documentation:
http://docs.python.org/2/library/collections.html#collections.defaultdict

Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
collections: adjust namespace so names appear as
autotest.client.shared.backports.collection.namedtuple

Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>