Deploy *-source.jar and *-javadoc.jar to folio-nexus

When Jenkins runs mvn deploy it uploads the .jar files with the .class files to folio-nexus: https://repository.folio.org .

*-source.jar and *-javadoc.jar files should also be generated and uploaded so that IDEs display javadoc to developers and allow them to debug into the folio-vertx-lib code.

Task:

Run maven-source-plugin and maven-javadoc-plugin at the beginning of the deploy phase.