convert os-net-config template to the new format (OSP10 to OSP13)

os-net-config-convert

#!/bin/env python
import argparse
import yaml

parser = argparse.ArgumentParser()
parser.add_argument('old_template', type=open, help='The old NIC template')
ns = parser.parse_args()

data = yaml.load(ns.old_template.read())
osnetcfgimpt = data['resources']['OsNetConfigImpl']
osnetcfgimpt['type'] = 'OS::Heat::SoftwareConfig'
osnetcfgimpt['properties']['group'] = 'script'
old_config = osnetcfgimpt['properties']['config']['os_net_config']['network_config']
osnetcfgimpt['properties']['config'] = {
    'str_replace': {
        'template': {
            'get_file': '/usr/share/openstack-tripleo-heat-templates/network/scripts/run-os-net-config.sh'},
        'params': {
            '$network_config': {
                'network_config': old_config}}}}
print(yaml.dump(data, Dumper=yaml.CDumper))