Need to manage how we store IO context based on DPDK updates made in 19.11. Fixes issue #1671 Signed-off-by: paul luse <paul.e.luse@intel.com> Change-Id: If1183808cd30987b6c999912f563949b7ade7fcb Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5799 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com> Community-CI: Mellanox Build Bot