JBIDE-16394 purge soa-site and soatests-site as no longer used
JBIDE-16394 purge local-site as no longer used
since local-site is gone, update readme in root pom (JBIDE-16394)
JBIDE-16376 set fetch-zips-for-aggregate.skip=true by default so local builds don't fail if omitted commandline