core:There is no notification on event tab...

There is no notification on event tab about what proxy is selected to fence a host

This patch is a pre step for the BZ fix that basically renames the
confusing FindVdsToFence method to findProxyHost

Change-Id: Ie6720715b1fd2a80f343796e3fdc47c40739d332
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=920112
Signed-off-by: Eli Mesika <emesika@redhat.com>