Update WINNF_FT_S_PCR_testcase.py
Update WINNF_FT_S_PCR_testcase.py

final clean up to address the remaining review comments.
Wireless-Innovation-Forum/Spectrum-Access-System,Wireless-Innovation-Forum/Spectrum-Access-System,Wireless-Innovation-Forum/Spectrum-Access-System,Wireless-Innovation-Forum/Spectrum-Access-System