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This bug is created as a clone of upstream ticket:
https://pagure.io/freeipa/issue/8440

### Issue
When ipa server/replica is installed in CA-less mode with a KDC certificate, the KDC cert is installed in /var/kerberos/krb5kdc/kdc.crt but the permissions are left as 0600 and this breaks WebUI authentication

#### Steps to Reproduce
1. install CA_less ipa server with ipa-server-install [...] --pkinit-cert-file /path/to/kdc.p12
2. check the permissions on /var/kerberos/krb5kdc/kdc.crt
3. install CA-less ipa replica with ipa-replica-install [...] --pkinit-cert-file /path/to/kdc.p12
4. check the permissions on /var/kerberos/krb5kdc/kdc.crt

#### Actual behavior
The file has 600 root:root permissions. Connection to the WebGUI fails.

#### Expected behavior
The file should have 644 root:root permissions. Connection to the WebGUI should succeed.

Upstream PR: https://github.com/freeipa/freeipa/pull/4974

Adding a Regression Keyword. Password authentication to Web UI in CA less mode used to work in a past. Don't know in what release it got broken though.

Fixed upstream
master:
https://pagure.io/freeipa/c/9335bd9299e54928a057cbd31de40aca0ef207b2
https://pagure.io/freeipa/c/a26e0ba558aa76323d90b807f2201992d6ee58b4

Fixed upstream
ipa-4-6:
https://pagure.io/freeipa/c/9c9b9fd5854badc3fa65bbda7648cacbb35b0436
https://pagure.io/freeipa/c/87ba8c50d79526021e938c0fcf8150d7a342c863

Fixed upstream
ipa-4-8:
https://pagure.io/freeipa/c/81c955e561dd42ab70a39bf636c90e82a9d7d899
https://pagure.io/freeipa/c/295dd4235f693b7b4b4270b46a28cb6e7b3d00b4

Test case provided in ipatests/test_integration/test_caless.py::TestPKINIT

With 4.8.7.9.module+el8.3.0+7664+fa35cfe6 automated test passed. report.html is attached.

Marking the bug as verified.

*** Bug 1826382 has been marked as a duplicate of this bug. ***

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: idm:DL1 and idm:client security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2020:4670