This patch removes Python 3.5-specific parts from Kuryr-Kubernetes.
The desicion was made [1] to make Kuryr-Kubernetes compatible with
Python 2.
[1] http://eavesdrop.openstack.org/\
meetings/kuryr/2016/kuryr.2016-10-03-14.00.html
Change-Id: Iff66ee2818088b02f259d56d50ce3e994814cc5d
Partially-Implements: blueprint kuryr-k8s-integration