validator: actually test success
validator: actually test success

Previously we only tested failures, which causes us to miss issues where
setting sysctls would *always* fail.

Signed-off-by: Aleksa Sarai <a8eb12d32d6ec07cdf737175ec7d4a0f1b4e1ee7@suse.de>

xiaochenshen/runc,dqminh/runc,mheon/runc,mYmNeo/runc,avagin/runc,mheon/runc,dqminh/runc,vbatts/runc,jhowardmsft/runc,laijs/runc,stefanberger/runc,justincormack/runc,adrianreber/runc,WeiZhang555/runc,estesp/runc,docker/runc,rajasec/runc,kolyshkin/runc,crosbymichael/runc,docker/runc,crosbymichael/runc,kolyshkin/runc,cloudfoundry-incubator/runc,opencontainers/runc,estesp/runc,cloudfoundry-incubator/runc,adrianreber/runc,sunyuan3/runc,adrianreber/runc,hqhq/runc,sunyuan3/runc,coolljt0725/runc,cyphar/runc,dqminh/runc,docker/runc,rhatdan/runc,shishir-a412ed/runc,rhatdan/runc,WeiZhang555/runc,opencontainers/runc,coolljt0725/runc,dqminh/runc,kolyshkin/runc,xiaochenshen/runc,mYmNeo/runc,mikebrow/runc,stefanberger/runc,cloudfoundry-incubator/runc,laijs/runc,rajasec/runc,mYmNeo/runc,maxamillion/runc,kolyshkin/runc,coolljt0725/runc,avagin/runc,opencontainers/runc,sunyuan3/runc,WeiZhang555/runc,vbatts/runc,rhatdan/runc,justincormack/runc,avagin/runc,laijs/runc,xiaochenshen/runc,wking/runc,hqhq/runc,shishir-a412ed/runc,opencontainers/runc,crosbymichael/runc,mikebrow/runc,wking/runc,shishir-a412ed/runc,maxamillion/runc,justincormack/runc,jhowardmsft/runc,jhowardmsft/runc,stefanberger/runc,mheon/runc,mikebrow/runc,wking/runc,cyphar/runc,rhatdan/runc,cyphar/runc,vbatts/runc,hqhq/runc,estesp/runc,maxamillion/runc,rajasec/runc