add grouper version to admin page

The grouper version will be printed out on the configuration page (only admins can see this).

You can edit a config to make this happen in your env before 2.5.45

Add a config entry for externalized text

configurationIndexSubtitle

System settings and wizards to setup the registry. Grouper version: ${edu.internet2.middleware.grouper.misc.GrouperVersion.grouperVersion()}