ipsec: use hash lookup with signatures in SAD lookup

ipsec: use hash lookup with signatures in SAD lookup

Change hash function from jhash to crc.
Precalculate hash signatures for a bulk of keys and then
use rte_hash_lookup_with_hash_bulk_data() to speed up sad lookup
Also use rte_hash_add_key_with_hash and _del_key_with_hash with
precalculated hash signature for a key in rte_ipsec_sad_add and
rte_ipsec_sad_del

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>