Graphical kickstart installation allows creation of admin user manually in Red Hat Enterprise Linux 7

Issue

• When one installs Red Hat Enterprise Linux 7.0 using kickstart profile, the graphical installation allows anybody interacting with the machine physically ATM to create an admin user resulting in security breach kind of problems.
• In case of kickstart provided, the user creation part shall be grayed out like it's seen for root user.
• Normally even in minimal installation, it takes 4-5 minutes to install the packages, which gives time to create an user and make him/her administrator which is not expected.