implement --fields ^x,y,z to remove fields from the default list

[ryran]

No description provided.

[ryran]

$ rhsecapi --help | grep -A5 -- --fields
  -f, --fields FIELDS   Comma-separated fields to be displayed (default:
                        threat_severity, public_date, bugzilla,
                        affected_release, package_state); optionally prepend
                        with plus (+) sign to add fields to the default (e.g.,
                        '-f +iava,cvss3') or a caret (^) to remove fields from
                        the default (e.g., '-f ^bugzilla,threat_severity')

[ryran]

$ rhsecapi --help | grep -A5 -- --fields
  -f, --fields FIELDS   Comma-separated fields to be displayed (default:
                        threat_severity, public_date, bugzilla,
                        affected_release, package_state); optionally prepend
                        with plus (+) sign to add fields to the default (e.g.,
                        '-f +iava,cvss3') or a caret (^) to remove fields from
                        the default (e.g., '-f ^bugzilla,threat_severity')