Adjust externalIdentifiers for the default admin/user account?

[tomas-knap]

Currently as depicted in DatabaseInitializer, e.g.:
admin.setFullName("John Admin");
admin.setPassword("test");
admin.setTableRows(20);
admin.setUsername("admin");
admin.setEmail(adminEmailAddress);
admin.addRole(adminRole);
admin.setExternalIdentifier("http://www.johnadmin.cz");
admin.addRole(userRole);

Check also how this behaves in case of migrating from UV 2.2 to UV 2.3 - because in this case the external identifier may be missing?!

[tomas-knap]

Adjusted initialization. Ext user id is also at UV 2.2