Fix pkcs11 system test to handle revoked key collisions.
Job #1286395 failed for c19a35c9:
S:pkcs11:2020-11-10T04:19:15+0000
T:pkcs11:1:A
A:pkcs11:System test pkcs11
I:pkcs11:PORTS:30765,30766,30767,30768,30769,30770,30771,30772,30773,30774
=I:pkcs11:Generating keys for Native PKCS#11
dnssec-keyfromlabel: fatal: dnssec-keyfromlabel: ./Krsasha256.example.+008+38641 could collide with another key upon revokation
I:pkcs11:setup.sh script failed
R:pkcs11:FAIL
E:pkcs11:2020-11-10T04:19:15+0000
FAIL pkcs11 (exit status: 1)