K8SPXC-1568: prevent having * prefix in proxyadmin password

[pooknull]

https://perconadev.atlassian.net/browse/K8SPXC-1568

CHANGE DESCRIPTION

Problem:
Short explanation of the problem.

Cause:
Short explanation of the root cause of the issue if applicable.

Solution:
Short explanation of the solution we are providing with this PR.

CHECKLIST

Jira

• Is the Jira ticket created and referenced properly?
• Does the Jira ticket have the proper statuses for documentation (Needs Doc) and QA (Needs QA)?
• Does the Jira ticket link to the proper milestone (Fix Version field)?

Tests

• Is an E2E test/test case added for the new feature/change?
• Are unit tests added where appropriate?
• Are OpenShift compare files changed for E2E tests (compare/*-oc.yml)?

Config/Logging/Testability

• Are all needed new/changed options added to default YAML files?
• Are all needed new/changed options added to the Helm Chart?
• Did we add proper logging messages for operator actions?
• Did we ensure compatibility with the previous version or cluster upgrade process?
• Does the change support oldest and newest supported PXC version?
• Does the change support oldest and newest supported Kubernetes version?

[JNKPercona]

Test Name	Result	Time
affinity-8-0	passed	00:05:38
auto-tuning-8-0	passed	00:17:44
cross-site-8-0	passed	00:32:33
custom-users-8-0	passed	00:10:18
demand-backup-cloud-8-0	passed	00:53:56
demand-backup-encrypted-with-tls-8-0	passed	00:42:47
demand-backup-8-0	passed	00:40:10
demand-backup-flow-control-8-0	passed	00:09:41
demand-backup-parallel-8-0	passed	00:08:33
demand-backup-without-passwords-8-0	passed	00:14:51
haproxy-5-7	passed	00:12:43
haproxy-8-0	passed	00:12:44
init-deploy-5-7	passed	00:15:22
init-deploy-8-0	passed	00:15:30
limits-8-0	passed	00:11:59
monitoring-2-0-8-0	passed	00:21:29
monitoring-pmm3-8-0	passed	00:16:22
one-pod-5-7	passed	00:13:18
one-pod-8-0	passed	00:13:24
pitr-8-0	passed	00:43:45
pitr-gap-errors-8-0	failure	00:03:01
proxy-protocol-8-0	passed	00:09:00
proxysql-sidecar-res-limits-8-0	passed	00:08:17
pvc-resize-5-7	passed	00:13:40
pvc-resize-8-0	failure	00:23:38
recreate-8-0	passed	00:16:00
restore-to-encrypted-cluster-8-0	passed	00:24:05
scaling-proxysql-8-0	passed	00:07:52
scaling-8-0	passed	00:10:03
scheduled-backup-5-7	passed	01:03:17
scheduled-backup-8-0	passed	01:01:36
security-context-8-0	passed	00:28:46
smart-update1-8-0	passed	00:30:43
smart-update2-8-0	passed	00:35:49
storage-8-0	passed	00:09:49
tls-issue-cert-manager-ref-8-0	passed	00:08:18
tls-issue-cert-manager-8-0	passed	00:10:41
tls-issue-self-8-0	passed	00:13:00
upgrade-consistency-8-0	passed	00:10:48
upgrade-haproxy-5-7	passed	00:22:06
upgrade-haproxy-8-0	passed	00:22:29
upgrade-proxysql-5-7	failure	00:38:09
upgrade-proxysql-8-0	passed	00:28:38
users-5-7	passed	00:24:59
users-8-0	passed	00:49:02
validation-hook-8-0	passed	00:01:27
We run 46 out of 46		16:28:24

commit: 87bfb29
image: perconalab/percona-xtradb-cluster-operator:PR-2124-87bfb297