[4.14] Install does not begin if secure boot was enabled for the first time

Description of problem:
If secure boot is currently disabled, and user attempts to enable it via ZTP, install will not begin the first time ZTP was triggered.

When secure boot is enabled viz ZTP, then boot options will be configured before virtual CD was attached, thus first boot will be booting into existing HD with secure boot on. Install will then get stuck because boot from CD was never triggered.

Version-Release number of selected component (if applicable):
4.10

How reproducible:
Always

Steps to Reproduce:
1. Secure boot is currently disabled in bios
2. Attempt to deploy a cluster with secure boot enabled via ZTP
3.

Actual results:

• spoke cluster got booted with secure boot option toggled, into existing HD
• spoke cluster did not boot into virtual CD, thus install never started.
• agentclusterinstall gets stuck here:
  State: insufficient
  State Info: Cluster is not ready for install

Expected results:

• installation started and completed successfully

Additional info:

Secure boot config used in ZTP siteconfig:
http://registry.kni-qe-0.lab.eng.rdu2.redhat.com:3000/kni-qe/ztp-site-configs/src/ff814164cdcd355ed980f1edf269dbc2afbe09aa/siteconfig/master-2.yaml#L40