Allow underscores in kerberos principal names #1941

Job	Run time
Check if committed README is the one we would render from the available parts	21s
Check if committed Helm charts are up to date	46s
Run Cargo Deny (advisories)	41s
Run Cargo Deny (bans licenses sources)	43s
Run Clippy	45s
Run RustDoc	1m 28s
Run Rustfmt	15s
Run Cargo Udeps	1m 51s
Run Cargo Tests	33s
Select target helm repository based on action trigger	1s
All tests passed	1s
Package Charts, Build Docker Image and publish them - ubuntu-latest	11m 25s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	10m 46s
Build and publish manifest list	44s
Run the OpenShift Preflight check on the published images	21s
	30m 41s

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