Separate CNI configuration from kube-proxy service definition

Description

The CNI configuration and HNS endpoint creation have been squashed into one script. This was done in order to work around WICD's ability to only run powershell scripts before a service is started.

Engineering Details

• The WICD API may have to adjusted in order to accomplish this, either by adding the ability to run powershell after a service is confirmed started, or as a separate 'service' all together.

Acceptance Criteria

• CNI configuration is done separately and independently of the kube-proxy service configuration