Maven plugin updates
Maven plugin updates

- io.fabric8:docker-maven-plugin ....... 0.26.1 -> 0.27.2
- maven-jxr-plugin ..................... 2.5 -> 3.0.0
- maven-pmd-plugin ..................... 3.10.0 -> 3.11.0
- maven-shade-plugin ................... 3.1.1 -> 3.2.0

greenmail-mail-test/greenmail,marcelmay/greenmail,greenmail-mail-test/greenmail,marcelmay/greenmail,marcelmay/greenmail,marcelmay/greenmail,marcelmay/greenmail,greenmail-mail-test/greenmail