function fix for checking on metal

onmetal.py

import os
import yaml
with open('/etc/rpc_deploy.OLD/rpc_environment.yml', 'r') as f:
    environment = yaml.safe_load(f.read())

onmetal = list()
for k, v in environment['container_skel'].items():
    if v.get('is_metal') == True:
        onmetal.append(k)

for root, _, files in os.walk('/etc/openstack_deploy/env.d'):
    for item in files:
        env_file = os.path.join(root, item)
        with open(env_file, 'r') as f:
            os_environment = yaml.safe_load(f.read())

        if 'container_skel' not in os_environment:
            continue

        changed = False
        for i in onmetal:
            if i in os_environment['container_skel']:
                changed = True
                os_item = os_environment['container_skel'][i]
                if 'properties' in os_item:
                    os_item['properties']['is_metal'] = True
                else:
                    properties = os_item['properties'] = dict()
                    properties['is_metal'] = True

        if changed:
            with open(env_file, 'w') as fsw:
                fsw.write(
                    yaml.safe_dump(
                        os_environment,
                        default_flow_style=False,
                        width=1000
                    )
                )