lower version, for example 2.6.8
```properties
dubbo.provider.version=1.0
```

2.7.6 failed to recognize the provider url with 'default.version=1.0' key,  it only takes 'version.1.0' into consideration.

}
        }
        String path;
        if (useService) {
            path = getServiceKey();
        } else {
            path = getPath();
        }
        if (StringUtils.isNotEmpty(path)) {
            buf.append("/");
            buf.append(path);
        }
        if (appendParameter) {
            buildParameters(buf, true, parameters);
        }
        return buf.toString();
    }
    public java.net.URL toJavaURL() {
        try {
            return new java.net.URL(toString());
        } catch (MalformedURLException e) {
            throw new IllegalStateException(e.getMessage(), e);
        }
    }
    public InetSocketAddress toInetSocketAddress() {
        return new InetSocketAddress(host, port);
    }
    /**
     * The format is "{interface}:[version]:[group]"
     *