Add realname attribute to user in minimal template schema

The `roundup-demo` command assumes that the `user` has a `realname`
attribute when it creates the demo user. Without adding the `realname`
attribute in the `minimal` template's schema an error will occur when a
user tries to create a new demo based on it.

Author: jerrykan

share/roundup/templates/minimal/schema.py

@@ -13,7 +13,8 @@
 
 # Note: roles is a comma-separated string of Role names
 user = Class(db, "user", username=String(), password=Password(),
-    address=String(), alternate_addresses=String(), roles=String())
+    address=String(), realname=String(), alternate_addresses=String(),
+    roles=String())
 user.setkey("username")
 db.security.addPermission(name='Register', klass='user',
                           description='User is allowed to register new user')