Model commonization: Type-B(PR2) is compatible with PAYLOAD_MASTER.

Model:
 Changed to PAYLOAD_MASTER/PAYLOAD_MASTER with reference to PRM(15652).

Set the following values to release WD and DK:
 K1:VIS-PR2_TM_WD_OPLEVAC_RMS_MAX: 0 -> 10000

We also rebooted the model and set it to MON with the default values, and then made the following changes
K1:VIS-PRM_DITHER{P,Y}2EUL_1_1: IM_DTHER_{PIT,YAW} is left at 0 since it is originally ground.
K1:VIS-PRM_DITHER{P,Y}2EUL_2_1: TM_DTHER_{PIT,YAW} was connected and changed to 1.0

Photon:
 The following values were deemed unnecessary and removed.
 PR2_IM_OL_DC_OFFLOAD_{P,Y}
 PR2_TM_DAMP_{P,Y}
 PR2_TM_OPLEV_SERVO_{LEN,PIT,YAW}

Increase/decrease of EPICS channel:
 Omitted because it is almost the same as PRM. See attached file for details.