[SaveMojo] create the savedir for explictl targets
[SaveMojo] create the savedir for explictl targets

docker:save will now also create the target directory when a saveFile has been
configured explicitly. Before this was only the case when the target
(directory) as computed automatically.

Signed-off-by: Thomas Weißschuh <1ed6ed487a2008a7eae4855cb871aa13dd4704f2@de.amadeus.com>

rhuss/docker-maven-plugin,fabric8io/docker-maven-plugin,vjuranek/docker-maven-plugin,fabric8io/docker-maven-plugin,vjuranek/docker-maven-plugin,fabric8io/docker-maven-plugin,rhuss/docker-maven-plugin,vjuranek/docker-maven-plugin