NewAction to use the Action<ActionBase> delegate instead of EventHandler. Thus
there is no need to fire them with Empty or null EventArgs and on several occasions
we avoid casting objects in the event handlers.
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
Added a smoke test category and assigned a selection of tests to this category
to get a broad coverage of XenCenter functionality which can be used to quickly
test XenCenter works on a given platform
