Respect HTTPMethodsEncodingParametersInURI when calculating OAuth

We had a weird case where we POST binary data to a URL with a query parameter, which we do with:

    opManager.requestSerializer.HTTPMethodsEncodingParametersInURI = [opManager.requestSerializer.HTTPMethodsEncodingParametersInURI setByAddingObject:@"POST"];

`BDBOAuth1RequestSerializer` should respect this like `AFHTTPRequestSerializer` does.