Fix Qualys parsing and importing. FIxes #1384
Fix Qualys parsing and importing. FIxes #1384

Some qualys scans are reports might not have the CVSS score to define the
severity of a finding.

This commit fixes the importing, assigns severity from qualys severity if
CVSS not present and improves parsing of data

rackerlabs/django-DefectDojo,rackerlabs/django-DefectDojo,OWASP/django-DefectDojo,OWASP/django-DefectDojo,rackerlabs/django-DefectDojo,OWASP/django-DefectDojo,rackerlabs/django-DefectDojo,OWASP/django-DefectDojo,OWASP/django-DefectDojo