testing: Update carols certificate in several test cases
testing: Update public keys and certificates in DNS zone
testing: Update public keys in DNSSEC scenarios

The tests are successful even if the public keys are not stored locally,
but an additional DNS query is required to fetch them.
testing: Update PKCS#8 keys
testing: Update PKCS#12 containers
testing: Make sure the whitelist plugin is ready before configuring it
testing: Actually build swanctl
testing: Wait a bit in swanctl scenarios before interacting with the daemon
testing: Updated swanctl certificates and keys