Provide a Graddle alternative for Coherence POF Maven plugin

[jfialli]

Followed description of using POF annotations to leverage generation of Portable Object code for application in ce22.06 guide for key association.

Excerpt from Key Associator guide:

Bothof the model classes are annotated with the @PortableType. This annotation is used by the Coherence POF Maven plugin to generate Portable Object code for the classes. Using the Coherence POF generator in this way avoids having to manually write serialization code and ensures that the serialization code generated is supports evolvability betweenversions.

I am using Graddle and would like to have an equivalent for the POF Maven plugin to generate Portable Object code for the classes.

For now, I am just falling back to specifying user pof-config file and specifying PofSerializers.