sma test: disable line wrapping for base64

Cipher keys in sma are encoded by base64 that by default wrap line
after 76chars. It causes issues for 256bit keys in sma flow.
Adding "-w 0" disables line wrapping

Signed-off-by: Michal Rozegnal <michal.rozegnal@intel.com>
Change-Id: Ic6a8136672b1cdbd8d71d3cc1caa82a5bc898636
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15888


Reviewed-by: Jacek Kalwas <jacek.kalwas@intel.com>
Reviewed-by:  <sebastian.brzezinka@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>