Addition of 1577 nm wavelength to the onboard power meter for the FTB platforms

Make your EXFO power meter XGS-PON compatible with this free update!

Update the FTB-1v2, FTB-2 or FTB-4 platforms to make the 1577 nm wavelength (XGS-PON) available on the onboard power meter (i.e., PM2X, VPM2X).