OSNR calculation and fiber type

New description : Now that the PCE has been revised for calculation up to 400G, it is important to calculate the power according to the fiber type. It is not included in latest OR specifications, because nobody made the job to extrapolate the power to other than G652 fibers, however the same policy we applied for 100G (provided by AT&T at that time) can be extended to 400G. After this is done, it shall be included in OLM to align on what is done in the PCE.

Jonas Description :
In the OSNR calculation in PceLink.java, the OSNR contribution from a (ROADM-to-ROADM) link depends on the channel power into the link (consistent with OpenROADM spec v2.0), and this power depends on the fiber type (varying from -1 to +2 dBm). However, the actual channel power level set by the OLM power management in PowerMgmt.java does not depend on fiber type. Instead, the power is always set to the highest level given in the OpenROADM spec. This means the calculated OSNR will not be correct.

(In the updated OpenROADM spec v3.0 the OSNR contribution from a link does not depend on the channel power into the link anymore, only on the power level into the ROADM after the link.)