Update Dockerfile to 1.6.2
Update Dockerfile to 1.6.2

With this change we need a fix in go 1.6 to allow us to receive SIGCONT
signals.

Ref: https://github.com/golang/go/issues/8953

Signed-off-by: Michael Crosby <951f4c7b5d47e32d0112c78d14a98eaa23e6b5ef@gmail.com>

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