ROSCO input file: write "PerfTableSize" as 2 ints (instead of 2 floats) so ROSCO can read it well

Author: gv

openfast_toolbox/io/rosco_discon_file.py

@@ -136,6 +136,7 @@ def toString(self):
                 FMTs['{:<4.4f}']=['WE_FOPoles_v']
                 FMTs['{:<10.8f}']=['WE_FOPoles']
                 FMTs['{:<10.3f}']=['PS_BldPitchMin']
+                FMTs['{:<7.0f}']=['PerfTableSize']
                 fmtFloat='{:<014.5f}'
                 for fmt,keys in FMTs.items():
                     if param in keys: