fixing delete null rawlocations step to clean up relevant applicant,a…

[bethanne-card]

…ssignee, and inventor tables as well

[jbutler-air]

Looks like there are some lines in patent_parser.py that you commented for testing that need to be uncommented (lines 11-13). Otherwise the code looks good. One note for clarity of functionality - the cleaning function isn't recursive (it doesn't call itself) so I would recommend keeping the name clean_rawlocation()