Undercloud install fails on install due to SELinux

Issue

• Undercloud install fails with the below error:

2021-06-11 16:24:00,868 p=3030 u=root n=ansible | Friday 11 June 2021  16:24:00 -0500 (0:00:00.167)       0:00:38.143
2021-06-11 16:24:01,122 p=3030 u=root n=ansible | fatal: [undercloud]: FAILED! => {"changed": false, "msg": "SELinux is disabled on this host."}
2021-06-11 16:24:01,123 p=3030 u=root n=ansible | NO MORE HOSTS LEFT

• Enabling SELinux results in the inability to ssh into the node via root or the stack user.