Enabling/disabling pump also drives wrist servo

[electric-monk]

Using the Python API, enabling the pump for the suction cup causes the servo will be slammed to one extreme, and the 'wrist control' methods to set the servo no longer work (they will work before this point). Similarly, disabling the pump will slam the servo to the other extreme. This is a major problem since it means you can't use the wrist servo at all with the suction cup, and the problem didn't seem to occur on older versions of the firmware.