minor: test fix for legacy mongo

test/replica_sets/refresh_with_threads_test.rb

@@ -10,7 +10,6 @@ class ReplicaSetRefreshWithThreadsTest < Test::Unit::TestCase
   end
 
   def teardown
-    @rs.restart_killed_nodes
     @conn.close if @conn
   end
 
@@ -45,9 +44,12 @@ class ReplicaSetRefreshWithThreadsTest < Test::Unit::TestCase
       end
     end
 
-    rescue_connection_failure do
     @rs.add_node
+
+    begin
       threads.each {|t| t.join }
+    rescue ConnectionFailure
+      # 1.8x will raise connection failures
     end
     
     @conn['admin'].command({:ismaster => 1})