Required Maven version should be the same as used Maven - 3.3.9
Required Maven version should be the same as used Maven - 3.3.9

Maven verify prerequisites.maven before executing plugin
so when you set lower version that used in code
some incompatibility can occur on older Maven.

Signed-off-by: Slawomir Jaranowski <1bd32a0562891f14123ee1f00e2854f3697eb7fa@gmail.com>

fabric8io/docker-maven-plugin,fabric8io/docker-maven-plugin,fabric8io/docker-maven-plugin