With help from YamaT-san

OMC guardian ASC part has been commissioned. It closes DOF1 and DOF2 loops to center the OMC input QPD loops by actuating OMMT2 and OSTM. We still (absolutely) need the pico motor centering in advance because the ranges are not enough large.  Since the sensors/actuators are not well diagonalized (or I took wrong numbers from Aso-san), all the four loops must be closed to center the two QPDs.

Next is the LSC part.