caaWorker: add very simple assertor
caaWorker: add very simple assertor

jasonthomas/tls-observatory,mozilla/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,mozilla/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,jasonthomas/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,mozilla/TLS-Observer