Modify adc calibration routine to disable phase switches

The calibration routine searches for a known pattern
which the phase switch mangles. This change turns off
an F-engines phase switch before calibrating, and
returns to the user-defined phase-switch enable state
afterwards.

Also pass verbosity parameter to AMIDC class
Set default verbosity to 1
Sleep 2 before reading status

Was sleep 1, and sometimes the status
would return 'armed=True' because
the sync generator hadn't yet been triggered
by PPS (or whatever 1PPSish signal generator
is currently being used)