examples/fips_validation: fix count overwrite for TDES

examples/fips_validation: fix count overwrite for TDES

Application updates first line of each test vector with
COUNT = i(where i = 1,2,3..) assuming first line contains
COUNT string. But few of the TDES input test vectors don't
contain COUNT string and thus COUNT is getting overwritten on
other data.

Fixes: 527cbf3d5ee3 ("examples/fips_validation: support TDES parsing")
Cc: stable@dpdk.org
Signed-off-by: Archana Muniganti <marchana@marvell.com>
Signed-off-by: Kanaka Durga Kotamarthy <kkotamarthy@marvell.com>