Cleanup docker image

[sergeyklay]

New docker images already have this logic:

echo exit 101 > /usr/sbin/policy-rc.d
chmod +x /usr/sbin/policy-rc.d
echo "force-unsafe-io" > /etc/dpkg/dpkg.cfg.d/02apt-speedup
echo "Acquire::http {No-Cache=True;};" > /etc/apt/apt.conf.d/no-cache