WP8139 Remove inverse-filter feedback

Danni, TJ., Dave:

Attached are images of a ring-heater inverse filter section before and after the changes applied 18:00 fri22mar2019.

The feedback from the INVERSE_INVERSE_FILTER_OUTVAL back to the EpicsInCtrl input part was removed. The EpicsInCtrl part was replaced with a standard EpicsIn. This meant that the mask record controlling the EpicsIn part (INVERSE_FILTER_MASK) was no longer needed. Given that this change was being made on a Friday night, I decided we will keep this part in the model, which meant that a DAQ restart was not needed when the model was loaded.

At this point in time, I will recommend we continue to keep the non-functional INVERSE_FILTER_MASK parts in the model, since removing them will cause MEDM and or Guardian problems. I am annotating the h1tcscs simulink model with a full description and a reference to this alog.