Add pki nss-cert-show --output-format option #4286

Job	Run time
Initialization / Initializing workflow	6s
Update Version / Test	20s
Waiting for build / Waiting For Build	3m 10s
Waiting for build / Waiting For Build - 2nd attempt	0s
PKICertImport / Test	1m 42s
PKI NSS CLI with RSA / Test	1m 4s
PKI NSS CLI with AES / Test	43s
PKI NSS CLI with ECC / Test	54s
PKI NSS CLI with HSM / Test	2m 13s
PKI NSS CLI with Extensions / Test	55s
PKI PKCS11 CLI / Test	1m 47s
PKI PKCS12 CLI / Test	1m 3s
PKI PKCS7 CLI / Test	1m 0s
rpminspect / Test	11m 53s
	26m 50s

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