Default path to downstream Swagger JSON does not respect service version

[satano]

Describe the bug

Default path for Swagger JSON is /swagger/v1/swagger.json. This path is hard-coded in SwaggerService class. This works only if my downstream API has version v1, or I must manually set correct path in ocelot.config.

To Reproduce

My downstream API has version 1.0 and I have this configuration:

"SwaggerEndPoints": [
    {
        "Key": "PayrollsApi",
        "Config": [
            {
                "Name": "Payrolls Api",
                "Version": "1.0",
                "Service": {
                    "Name": "PayrollsApi"
                }
            }
        ]
    }
]

This does not work, because the URL for downstream Swagger is built with path /swagger/v1/swagger.json, but the correct path is /swagger/1.0/swagger.json.

Of course, I can manually configure the path, so this works:

"SwaggerEndPoints": [
    {
        "Key": "PayrollsApi",
        "Config": [
            {
                "Name": "Payrolls Api",
                "Version": "1.0",
                "Service": {
                    "Name": "PayrollsApi",
                    "Path": "/swagger/1.0/swagger.json"
                }
            }
        ]
    }
]

Expected behavior

It would be nice, if the default path respects configured API version and use /swagger/v1/swagger.json only as the last option.