FMS-FPS correlation comparison: RUN15 <-> RUN17

- RUN15:
   a. picked up following 4 runs: 16066033, 16070003, 16080002, 16090001
   b. E > 5 (GeV), Require > 0.5 MIP for all channels
   c. In general all these runs show shifted behavior similar to RUN17, except FPSL1 in run 16070003
   d. FPS layer 1 in run 16070003 shows relatively good alignment but L2 and L3 sill shifted.

- RUN17:
   a. run 16080035
   b. E > 5 (GeV), Require MIP cut differ by channel