Add DisabledInit to C++ Command Based template. Move and modify comment on Java version. Fixes artf3840

Change-Id: I2371fc9cf64588e38f35b17715773604df6c2392

eclipse-plugins/edu.wpi.first.wpilib.plugins.cpp/resources/templates/command-based/Robot.cpp

@@ -16,6 +16,15 @@ private:
 		lw = LiveWindow::GetInstance();
 	}
 	
+	/**
+     * This function is called once each time the robot enters Disabled mode.
+     * You can use it to reset any subsystem information you want to clear when
+	 * the robot is disabled.
+     */
+	void DisabledInit()
+	{
+	}
+	
 	void DisabledPeriodic()
 	{
 		Scheduler::GetInstance()->Run();