Update csrgen test to understand OpenSSL 3.0.0 output
OpenSSL 3.0.0 change a lot of output messages. When verifying
a certificate instead of printing just "verify OK" it prints
"Certificate request self-signature verify OK"
Modify the check to match both OpenSSL 1.x and 3.x
Signed-off-by: Rob Crittenden <firstname.lastname@example.org>