test/crypto: refactor scheduler workers init
test/crypto: refactor scheduler workers init

Previously, the scheduler unit test only created and attached 1 or 2
AESNI-MB cryptodev PMDs as workers if less than 2 AESNI-MB PMDs had
already been initialized.

This commit changes this to always create and attach 2 new AESNI-MB
cryptodev PMDs, regardless of previously initialized AESNI-MB PMDs.

Signed-off-by: Rebecca Troy <9e85d91c3674b087e1ea4ed77846ba081d9b731b@intel.com>
Acked-by: Fan Zhang <b46d470dc79aa6fd718cd24d07380f6203b7fc3c@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk