Default to a 10 seconds timeout in socket specs

Author: eregon

spec/ruby/library/socket/fixtures/classes.rb

@@ -85,7 +85,7 @@ def self.loop_with_timeout(timeout = 5)
     end
   end
 
-  def self.wait_until_success(timeout = 5)
+  def self.wait_until_success(timeout = 10)
     loop_with_timeout(timeout) do
       begin
         return yield