update ofp version code

src/main.rs

-use tenjin::{example, openflow::ofp10::ControllerFrame10};
+use tenjin::{example, openflow::ofp13::ControllerFrame13};
 extern crate byteorder;
 
 fn main() -> Result<(), std::io::Error> {
-    let controller = example::Controller10::new();
+    let controller = example::Controller13::new();
     controller.listener("127.0.0.1:6633");
     Ok(())
 }

src/openflow/ofp13/ofp_header.rs

@@ -23,7 +23,7 @@ impl OpenflowHeader for OfpHeader {
         }
     }
     fn version(&self) -> usize {
-        1
+        4
     }
     fn message(&self) -> u8 {
         self.message

src/openflow/ofp13/ofp_manager.rs

@@ -35,10 +35,10 @@ impl OfpMsgEvent for Openflow13 {
         PacketOutEvent::new(port_id, payload, actions)
     }
     fn ofp_version() -> usize {
-        1
+        4
     }
     fn version(&self) -> usize {
-        1
+        4
     }
 
     fn header(&self, message: u8, length: u16, xid: u32) -> OfpHeader {