Address in ticket; bug fixes

First, I change the street, location etc. properties in Ticket to an
embedded reference to class Address and change the views and database
structure.

Second, I fix a bug in print version.  After using Address objects in
various classes the generated XML has changed and thus, had to be
adapted.
Clean up generated code, upgrades

First, I remove the folder web-app/js/app, containing the generated
JavaScript files, from the repository.

Then, I upgrade the mySQL JDBC connector.