In v3, some acquisition parameter readback PVs are wrong for PIMEGA detectors

[ericonr]

The issue is caused by getting the readback value from the wrong module. The affected parameters are:

• AcquirePeriod
• NumExposures
• AcquisitionStatus
• TimeRemaining
• NumExposuresCounter

LNLS has fixed this in our internal pimega-api, but it has yet to be merged.