Blank EE6 WAR and EAR Maven Archetypes

Blank or empty archetypes
At this time, the current EE6 WAR and EAR archetypes add several demo/example files to the resulting project - this is wonderful for the new user and the getting started experience but less desirable for the advanced Maven user who just wants the project layout and initial pom.xml.

Provide an option for either a blank/empty archetype or easy removal of the demo/example code.