Add pki nss-cert-show --output-format option #4336

Job	Run time
Initialization / Initializing workflow	5s
Waiting for build / Waiting For Build	4m 0s
Waiting for build / Waiting For Build - 2nd attempt	0s
OCSP with CMC / Test	5m 53s
OCSP on separate instance / Test	4m 57s
OCSP clone / Test	10m 1s
Basic OCSP / Test	5m 52s
OCSP with direct CRL publishing / Test	7m 41s
OCSP with LDAP-based CRL publishing / Test	8m 26s
OCSP with external certs / Test	6m 47s
OCSP with HSM / Test	5m 42s
Standalone OCSP / Test	2m 45s
	1h 2m 9s

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