This patch fixes the gate blocker for CentOS 7 in the Newton branch. The grep for `rpmverify` needed an update to exclude `/var` and `/etc`. Files in both directories are updated in the security role. Also, the `yum-cron` packaging bug affects the Newton branch as well. The workaround from master (I80b66a6d9e7c8ad97761a1f890ec6a3d2db88659) is backported to Newton. Change-Id: I9b0f77eceb32d18a0d07f53ff1dbac2117b29da4