Add resumeToken() in ConnectionSetupPayload class

[linux-china]

Please add resumeEnabled() and resumeToken() in ConnectionSetupPayload class

public abstract class ConnectionSetupPayload {
  public boolean abstract resumeEnabled()
  public ByteBuf abstract resumeToken()
}

resumeEnabled() and resumeToken() already implemented in ConnectionSetupPayload class.

class SetupFrameFlyweight {
 public static boolean resumeEnabled(ByteBuf byteBuf)
  public static ByteBuf resumeToken(ByteBuf byteBuf); 
}