Generate yaml for haproxy charm

gistfile1.py

#!/usr/bin/env python
import json

service = [
    {
        'service_name': 'demo',
        'service_options': ['mode http', 'balance leastconn', 'option httpchk GET / HTTP/1.0'],
        'server_options': ['maxconn 100'],
        'servers': [
            [
                'demo-1',
                '${host}',
                '${port}',
                ''
            ]
        ]
    },
]
services = json.dumps(foo)
services = services.replace('"', "'")
print "relation-set \"services=%s\"" % services