app/testpmd: add or delete flow director filter
app/testpmd: add or delete flow director filter

Commands are added to test adding or deleting flow director filters.
10 flow types in flow director are supported: ipv4, ipv4-frag, tcpv4, udpv4, sctpv4, ipv6, ipv6-frag, tcpv6, udpv6, sctpv6

Signed-off-by: Jingjing Wu <64d28b617c3b4840f5ded1bfa611cba7fadfe5c7@intel.com>
Acked-by: Konstantin Ananyev <cbd5212b59ab42a210d72992d23a3aa17cfd3eaf@intel.com>

phermansson/dpdk,phermansson/dpdk,phermansson/dpdk,phermansson/dpdk