DPDK: drop incoming packets if allocation fails in the copy-flow
DPDK: drop incoming packets if allocation fails in the copy-flow

Ensure the "detaching" of rte_mbuf from the received data in the copy path.
This patch completes the above in case the allocation of the buffer to
copy the newly arrived data to has failed.

In the above case we prefer to drop the arrived packet instead of consuming
the rte_mbuf from the Rx ring's mempool.

Signed-off-by: Vlad Zolotarov <976c0f8d0852ed6439ad273880b400a75a7c41d0@cloudius-systems.com>

eklitzke/scylla,ducthangho/imdb,linearregression/scylla,xtao/seastar,norcimo5/seastar,dwdm/seastar,eklitzke/scylla,bowlofstew/seastar,chunshengster/seastar,gwicke/scylla,glommer/scylla,eklitzke/scylla,gwicke/scylla,victorbriz/scylla,joerg84/seastar,victorbriz/scylla,dreamsxin/seastar,asias/scylla,rluta/scylla,raphaelsc/scylla,kjniemi/seastar,flashbuckets/seastar,flashbuckets/seastar,linearregression/seastar,bowlofstew/seastar,guiquanz/scylla,ducthangho/imdb,jonathanleang/seastar,cloudius-systems/seastar,wildinto/seastar,justintung/scylla,anzihenry/seastar,avikivity/seastar,kangkot/scylla,sjperkins/seastar,flashbuckets/seastar,shaunstanislaus/scylla,stamhe/scylla,cloudius-systems/seastar,mixja/seastar,kjniemi/scylla,kjniemi/scylla,acbellini/seastar,bowlofstew/scylla,scylladb/scylla,capturePointer/scylla,wildinto/scylla,rluta/scylla,anzihenry/seastar,scylladb/scylla,stamhe/seastar,dreamsxin/seastar,wildinto/scylla,koolhazz/seastar,stamhe/scylla,printedheart/seastar,aruanruan/scylla,koolhazz/seastar,kangkot/scylla,respu/scylla,scylladb/scylla,scylladb/seastar,respu/scylla,xtao/seastar,bzero/seastar,leejir/seastar,mixja/seastar,stamhe/scylla,phonkee/scylla,glommer/scylla,avikivity/seastar,cloudius-systems/seastar,duarten/scylla,shaunstanislaus/scylla,scylladb/scylla,bowlofstew/scylla,chunshengster/seastar,aruanruan/scylla,capturePointer/scylla,jonathanleang/seastar,jonathanleang/seastar,rentongzhang/scylla,leejir/seastar,phonkee/scylla,kjniemi/scylla,duarten/scylla,rentongzhang/scylla,scylladb/scylla-seastar,linearregression/seastar,asias/scylla,dreamsxin/seastar,scylladb/scylla-seastar,shyamalschandra/seastar,victorbriz/scylla,wildinto/seastar,linearregression/scylla,glommer/scylla,acbellini/scylla,tempbottle/seastar,mixja/seastar,bowlofstew/seastar,anzihenry/seastar,dwdm/seastar,tempbottle/seastar,avikivity/scylla,justintung/scylla,senseb/scylla,norcimo5/seastar,syuu1228/seastar,wildinto/scylla,rluta/scylla,dwdm/scylla,bowlofstew/scylla,xtao/seastar,ducthangho/imdb,tempbottle/seastar,joerg84/seastar,syuu1228/seastar,wildinto/seastar,respu/scylla,asias/scylla,joerg84/seastar,bzero/seastar,senseb/scylla,capturePointer/scylla,linearregression/seastar,hongliangzhao/seastar,stamhe/seastar,norcimo5/seastar,gwicke/scylla,avikivity/scylla,printedheart/seastar,avikivity/seastar,justintung/scylla,tempbottle/scylla,acbellini/scylla,rentongzhang/scylla,raphaelsc/scylla,senseb/scylla,tempbottle/scylla,scylladb/seastar,kangkot/scylla,acbellini/seastar,dwdm/seastar,hongliangzhao/seastar,chunshengster/seastar,linearregression/scylla,syuu1228/seastar,kjniemi/seastar,koolhazz/seastar,printedheart/seastar,dwdm/scylla,avikivity/scylla,stamhe/seastar,sjperkins/seastar,shyamalschandra/seastar,duarten/scylla,acbellini/seastar,scylladb/scylla-seastar,shaunstanislaus/scylla,phonkee/scylla,raphaelsc/scylla,aruanruan/scylla,bzero/seastar,leejir/seastar,hongliangzhao/seastar,kjniemi/seastar,sjperkins/seastar,dwdm/scylla,scylladb/seastar,guiquanz/scylla,tempbottle/scylla,guiquanz/scylla,acbellini/scylla,shyamalschandra/seastar