Generifing SimpleVirtualLazyTreeViewerTest

Change-Id: I7bfec11b7ecffe7daedae295c45b9d9b34217982
Signed-off-by: Hendrik Still <hendrik.still@gammas.de>
Generified VirtualLazyTableViewerTest


Change-Id: I4c22370b69b8d754c06a6819183cb1d43599f0ff
Signed-off-by: Hendrik Still <hendrik.still@gammas.de>
Other Unit Test from viewers package

Change-Id: I549cb30503947244d2c28860393bab2499771cdd
Signed-off-by: Hendrik Still <hendrik.still@gammas.de>