UpgradeSettingsCommandlet: settings/templates/conf/.m2 #807
Description
if settings/templates/conf/.m2 folder exists, it is renamed to settings/templates/conf/mvn.
This is from #759 and a potentially dangerous change and we should discuss if we want to ask the user before applying the change. Therefore the user must understand the impact, what might not be so easy to explain. For .m2 vs. mvn all existing installations also need to be updated. IMHO I cared about compatibilities and fallbacks in our code so it should not break but maybe some templates may contain hardcoded references to .m2 and will stop working then.