ofproto_v1_5_parser: Add OFPActionCopyField support
ofproto_v1_5_parser: Add OFPActionCopyField support

OpenFlow Spec 1.5 introduces Copy-Field action which allows to copy
the value from one header or pipeline field into another header or
pipeline field (EXT-320).

This patch add Copy-Field action support.

Signed-off-by: IWASE Yusuke <bb80e84cc9f5a8f01385872ee89032beb5d4eba7@gmail.com>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

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