Vaadin 8 OSGi demo upgraded to Vaadin 8.14.0

[Richard Hierlmeier]

today I upgraded my Vaadin 8 OSGI demo project to Vaadin 8.14.0.
see
https://github.com/rhierlmeier/vaadin8_karaf_demo

Feel free an integrate it into the Karaf examples.

Regards

 Richard