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.

Number n = getCachedNumber(method, key);
        if (n != null) {
            return n.floatValue();
        }
        String value = getMethodParameter(method, key);
        if (StringUtils.isEmpty(value)) {
            return defaultValue;
        }
        float f = Float.parseFloat(value);
        updateCachedNumber(method, key, f);
        return f;
    }
    public long getMethodParameter(String method, String key, long defaultValue) {
        Number n = getCachedNumber(method, key);
        if (n != null) {
            return n.longValue();
        }
        String value = getMethodParameter(method, key);
        if (StringUtils.isEmpty(value)) {
            return defaultValue;
        }
        long l = Long.parseLong(value);
        updateCachedNumber(method, key, l);
        return l;
    }
    public int getMethodParameter(String method, String key, int defaultValue) {
        Number n = getCachedNumber(method, key);
        if (n != null) {
            return n.intValue();
        }