make an event for droplet moving hypervisors

Signed-off-by: Jeff Carr <jcarr@wit.com>

poll.go

@@ -77,9 +77,17 @@ func (h *HyperT) pollHypervisor() {
 				continue
 			}
 
+			// if this is blank, the droplet has probably never booted yet
+			if d.CurrentHypervisor == "" {
+				d.CurrentHypervisor = h.pb.Hostname
+				continue
+			}
+
 			// this means the droplet has moved
 			if d.CurrentHypervisor != h.pb.Hostname {
 				log.Log(EVENT, "droplet", d.Hostname, "moved to", h.pb.Hostname)
+				// record the droplet migrated (or booted somewhere else? recording this is a work in progress)
+				me.cluster.DropletMoved(d, h.pb)
 				continue
 			}
 			d.CurrentHypervisor = h.pb.Hostname