emergencyStop function in balisktank test

emergencyStop
The purpose of this function is to further damage from a function not working correctly.

• Line 142 add if (serial == "stop") emergencyStop(); in to loop
• Line 600 added void emergencyStop();

void emergencyStop(){

  while(1){

    AirRegulatorServo("90")

    

    delay(1000);

  }

}

Make non case sensative.