[Hps-ecal] commissioning update

[Nathan Baltzell]

Dear Everyone,

Working point calibration of Top LEDs was done this morning
(and a new signal cable problem found):
https://logbooks.jlab.org/entry/3303817

During which we noticed a new important issue:
https://logbooks.jlab.org/entry/3303943

The tripping HV groups are recorded here:
https://logbooks.jlab.org/entry/3303909

Summary of cosmic run status:
https://logbooks.jlab.org/entry/3303918

-Nathan, Holly, et.al ...