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.

}
    /**
     * @see #getParameter(String, boolean)
     * @deprecated Replace to <code>getParameter(String, boolean)</code>
     */
    @Deprecated
    public boolean getBooleanParameter(String key) {
        return getParameter(key, false);
    }
    /**
     * @see #getParameter(String, boolean)
     * @deprecated Replace to <code>getParameter(String, boolean)</code>
     */
    @Deprecated
    public boolean getBooleanParameter(String key, boolean defaultValue) {
        return getParameter(key, defaultValue);
    }
    /**
     * @see #getMethodParameter(String, String, int)
     * @deprecated Replace to <code>getMethodParameter(String, String, int)</code>
     */
    @Deprecated
    public int getMethodIntParameter(String method, String key) {
        return getMethodParameter(method, key, 0);
    }
    /**
     * @see #getMethodParameter(String, String, int)
     * @deprecated Replace to <code>getMethodParameter(String, String, int)</code>
     */
    @Deprecated