Return a more meaningful error when namespaces are disabled
Return a more meaningful error when namespaces are disabled

Signed-off-by: Dan Walsh <7800de746fd39599bc46177380ea6aede7e31e16@redhat.com>

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