minor: testing cleanup, suppress mongod startup output in rs tests

test/replica_sets/read_preference_test.rb

@@ -105,7 +105,6 @@ class ReadPreferenceTest < Test::Unit::TestCase
     @rs.kill_primary
     assert_equal 2, @coll.find.to_a.length
     rescue_connection_failure do
-      puts "@coll.save()"
       @coll.save({:a => 50}, :safe => {:w => 2, :wtimeout => 10000})
     end
     @rs.restart_killed_nodes

test/replica_sets/refresh_test.rb

@@ -95,7 +95,7 @@ class ReplicaSetRefreshTest < Test::Unit::TestCase
     num_secondaries = @conn.secondary_pools.length
     old_refresh_version = @conn.refresh_version
 
-    n = @rs.kill_secondary
+    @rs.kill_secondary
     sleep(4)
     @conn['foo']['bar'].find_one
 

test/tools/repl_set_manager.rb

@@ -131,6 +131,7 @@ class ReplSetManager
     @mongods[n]['start'] += " --dur" if @durable
     @mongods[n]['start'] += " --smallfiles" if @smallfiles
     @mongods[n]['start'] += " --noprealloc" unless @prealloc
+    @mongods[n]['start'] += "> /dev/null 2>/dev/null"
     @mongods[n]['start']
   end