Improve the ATPneumatics XML as per disussion with Rolando Cantarutti

• Ditch the Position events because they are fully duplicated by the limit switch events.
• Add Invalid mirror cover state to handle the case that both an open and a closed switch are active for the same cover.
• Ditch the overlap of the “state” enums with summary state and shorten the names to remove redundancy and stutter, so that the MirrorCoverState enums become:

  <Enumeration>MirrorCovers_Closed,MirrorCovers_Opened,MirrorCovers_InMotionState, MirrorCovers_Invalid</Enumeration>

  and the mirror vents state enum becomes:

  <Enumeration>CellVents_Opened,CellVents_Closed,CellVents_InMotion</Enumeration>

• Delete the resetEStopTriggered event, rename the eStopTriggered event to eStopTrigger and set the triggered field appropriately.
• Add two new events for reporting m1 and m2 commanded air pressure (each with a single field), unless folks have a very strong desire to add fields to the existing m1AirPressure and m2AirPressure telemetry instead.
• Flesh out the Description and Units fields (including the units for pressure, which are Pa).