hybrid service path configurable

[GavinChenYan]

Currently, light-hybrid-4j set the default RPC router paths as:

           .addPrefixPath("/api/colfer", new ColferHandler())
            .addPrefixPath("/api/json", new JsonHandler())
            .addPrefixPath("/api/form", new FormHandler()

We may need allow user to add/config their path for hybrid service