add test to ci for go fmt
add test to ci for go fmt

Signed-off-by: Jessica Frazelle <e0d1a862d8f31af605ecef8c92857b8938ba622e@docker.com>

mitchcapper/cfssl,drcapulet/cfssl,drcapulet/cfssl,endocode/cfssl,dhiltgen/cfssl,sfurman3/cfssl,mitchcapper/cfssl,mitchcapper/cfssl,APTy/cfssl,geligaoli/cfssl,cloudflare/cfssl,APTy/cfssl,drcapulet/cfssl,codyli520/cfssl,endocode/cfssl,dhiltgen/cfssl,drcapulet/cfssl,dhiltgen/cfssl,cloudflare/cfssl,rolandshoemaker/cfssl,geligaoli/cfssl,dhiltgen/cfssl,rolandshoemaker/cfssl,cloudflare/cfssl,endocode/cfssl,sfurman3/cfssl,APTy/cfssl,codyli520/cfssl,sfurman3/cfssl,geligaoli/cfssl,dhiltgen/cfssl,rolandshoemaker/cfssl,codyli520/cfssl,codyli520/cfssl,sfurman3/cfssl,geligaoli/cfssl,APTy/cfssl,drcapulet/cfssl,endocode/cfssl,sfurman3/cfssl,endocode/cfssl,rolandshoemaker/cfssl,rolandshoemaker/cfssl,codyli520/cfssl,cloudflare/cfssl,geligaoli/cfssl,APTy/cfssl