Fix copyrights uuid migration; added feature scenario for copyrights

..‥ to exercise selection of copyright children

Squashed commit of the following:

commit f3f9b3a2d2940260a56e1b00b88e427ae0811fe2
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Mar 5 14:38:09 2014 +0100

    Added feature test for selecting a child of a license

commit 895e1dbae3a2ec33e895226e777bcc852f7804ae
Author: Thomas Schank <DrTom@schank.ch>
Date:   Wed Mar 5 14:08:23 2014 +0100

    Fix copyrights uuid migration