Setting an invalid session in the crypto op results in SEGFAULT because
the JOB user_data was never set to the crypto op.
Fixes: 0f548b50a160 ("crypto/aesni_mb: process crypto op on dequeue")
Cc: stable@dpdk.org
Signed-off-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>