Fixed javadoc build on Java 8 by turning off the fascist DocLint. Solves #547

DocLint emited errors in Orchid and Protos javadocs which we are very unlikely to fix.

This commit un-promotes these errors back to warnings so the:

    mvn javadoc:javadoc

goes smooth on Java 8. Solves http://tinyurl.com/p4akcfs