Fix an error in redis-trib where we always talk with same node.

While iterating the list of nodes we want to set the slot as stable in
the current node, not always in the first node of the list.

src/redis-trib.rb

@@ -469,6 +469,8 @@ class RedisTrib
         # number of keys, among the set of migrating / importing nodes.
         if !owner
             xputs "*** Fix me, some work to do here."
+            # Select owner...
+            # Use ADDSLOTS to assign the slot.
             exit 1
         end
 
@@ -498,7 +500,7 @@ class RedisTrib
                 next if node == owner
                 move_slot(node,owner,slot,:verbose=>true,:fix=>true,:cold=>true)
                 xputs ">>> Setting #{slot} as STABLE in #{node}"
-                importing[0].r.cluster("setslot",slot,"stable")
+                node.r.cluster("setslot",slot,"stable")
             }
         else
             xputs "[ERR] Sorry, Redis-trib can't fix this slot yet (work in progress)"