Add serial number to CertificateIssued log struct #260

Job	Run time
ubuntu-build-with-local-db	1m 29s
ubuntu-build-with-local-db	1m 29s
ubuntu-build-with-influx	1m 18s
ubuntu-build-with-influx	1m 18s
macos-build-with-all	3s
macos-build-with-all	2m 5s
ubuntu-build-with-splunk	1m 26s
ubuntu-build-with-splunk	1m 26s
ubuntu-build-with-all-except-yubikey	1m 42s
ubuntu-build-with-all-except-yubikey	1m 42s
ubuntu-build-with-amazon-kms	1m 33s
ubuntu-build-with-amazon-kms	1m 33s
	17m 4s

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