Update grepfqparser.py

grep returns a status of 1 (failure) when no results are found which crashes the script.  I changed calls to grep from check_call to call to avoid this.

I also changed the last rm call from check_call to call since tempfq and errlog1 won't always exist.
Merge pull request #1 from gregpinero/patch-1

Update grepfqparser.py