sysconfig renderer does not process 'routes' from network_state

This bug was originally filed in Launchpad as [LP: #1687726](https://bugs.launchpad.net/cloud-init/+bug/1687726)

Launchpad details

affected_projects = []

assignee = None

assignee_name = None

date_closed = None

date_created = 2017-05-02T19:12:48.487132+00:00

date_fix_committed = None

date_fix_released = None

id = 1687726

importance = medium

is_complete = False

lp_url = https://bugs.launchpad.net/cloud-init/+bug/1687726

milestone = None

owner = raharper

owner_name = Ryan Harper

private = False

status = confirmed

submitter = raharper

submitter_name = Ryan Harper

tags = ['centos7']

duplicates = []

_Launchpad user **Ryan Harper(raharper)** wrote on 2017-05-02T19:12:48.487132+00:00_

% cat network_static_routes.yaml
network:
version: 1
config:
- type: physical
name: interface0
mac_address: "52:54:00:12:34:00"
subnets:
- address: 172.23.31.42/26
gateway: 172.23.31.2
type: static
- type: route
id: 4
metric: 0
destination: 10.0.0.0/12
gateway: 172.23.31.1
- type: route
id: 5
metric: 0
destination: 192.168.0.0/16
gateway: 172.23.31.1
- type: route
id: 6
metric: 1
destination: 10.200.0.0/16
gateway: 172.23.31.1

% PYTHONPATH=`pwd` ./tools/net-convert.py --network-data network_static_routes.yaml --kind yaml --output-kind sysconfig -d target

% find target -type f
target/etc/resolv.conf
target/etc/udev/rules.d/70-persistent-net.rules
target/etc/sysconfig/network-scripts/ifcfg-interface0
target/etc/sysconfig/network

No route-$iface files were generated.

1. no cloud, rendering from in-tree
2. cloud-init master tip