Fix type mismatch in executor test

Change LastHeartbeat from now.Unix() to now to match time.Time type

Signed-off-by: Jakob Haahr Taankvist <[email protected]>

Author: jakobht

service/sharddistributor/handler/executor_test.go

@@ -416,7 +416,7 @@ func TestHeartbeat(t *testing.T) {
 			Status:     types.ExecutorStatusACTIVE,
 		}
 		previousHeartbeat := store.HeartbeatState{
-			LastHeartbeat: now.Unix(),
+			LastHeartbeat: now,
 			Status:        types.ExecutorStatusACTIVE,
 		}