Maven gatekeeping
Maven gatekeeping

- Updated plugins
  io.fabric8:docker-maven-plugin .................... 0.15.12 -> 0.16.3
  maven-war-plugin ...................................... 2.6 -> 3.0.0

greenmail-mail-test/greenmail,chriswhite199/greenmail,buildscientist/greenmail,marcelmay/greenmail,chriswhite199/greenmail,buildscientist/greenmail,buildscientist/greenmail,marcelmay/greenmail,buildscientist/greenmail,greenmail-mail-test/greenmail,chriswhite199/greenmail,chriswhite199/greenmail,marcelmay/greenmail,greenmail-mail-test/greenmail,marcelmay/greenmail,buildscientist/greenmail,marcelmay/greenmail,chriswhite199/greenmail