Kickstart option to prevent creating anaconda-ks.cfg

Issue

• Deployed systems write out a kickstart file to /root/anaconda-ks.cfg that can be used to kickstart similarly configured systems. This is a handy way to generate a kickstart file if you need one. However, in many cases you don't, especially if you already used one to deploy the system in the first place.
• In these scenarios it is best to remove the file since it contains potentially sensitive information, such as root's password or hash.
• Previously it could be removed during %post (as noted here: https://access.redhat.com/solutions/504253), however in RHEL 7 it is created after %post making it more difficult to cleanup.
• I would like a kickstart option that would be able to disable the creation of this second kickstart file. This could be used to override the default of creating /root/anaconda-ks.cfg and later cleanup would not be needed.