Conf 2

This was an old ticket that was actually done a long time ago. The goal was to split constants classes into separate classes for units and configuration file names. Since then we have introduced multiple generators for other configuration files, that are done in separate branches. The corresponding additions of file name constants should also be done in those branches.

bundles/org.oceandsl.configuration.cli/.settings/org.eclipse.core.resources.prefs

+eclipse.preferences.version=1
+encoding/<project>=UTF-8