Correct pci resources log

In _report_final_resource_view() method, Nova will never record
"free pci" in log message because 'pci_devices' is not in dict 'resources'.

Closes-bug: #1314008

Change-Id: I90f1e3c624922c39e47f5e1fcccc7e33139d54e7
Merge "Correct pci resources log"