openflow: Use (what appear to be the) correct filter names for a few fields.

Change-Id: I2acd93d99942601b34c85177d21bbc2c4a4e2633
Reviewed-on: https://code.wireshark.org/review/5492
Reviewed-by: Anders Broman <a.broman58@gmail.com>
(cherry picked from commit 7c475037e4b58d75a513f206896db1885cdb9ada)
Reviewed-on: https://code.wireshark.org/review/5839
Reviewed-by: Bill Meier <wmeier@newsguy.com>