Fix for issue hierynomus#910: Bad packet received by server when hear…

…beat is enabled

src/main/java/net/schmizz/sshj/SSHClient.java

@@ -804,12 +804,12 @@ protected void onConnect()
             throws IOException {
         super.onConnect();
         trans.init(getRemoteHostname(), getRemotePort(), getInputStream(), getOutputStream());
+        doKex();
         final KeepAlive keepAliveThread = conn.getKeepAlive();
         if (keepAliveThread.isEnabled()) {
             ThreadNameProvider.setThreadName(conn.getKeepAlive(), trans);
             keepAliveThread.start();
         }
-        doKex();
     }
 
     /**