Shorten rmquser kuttl test names to fit 63-char label limit

[lmiccini]

infra-operator commit fcc8556 changed RabbitMQ user CR naming to shared canonical names (--user-). With cluster=rabbitmq-notifications and user/vhost=watcher-notifications, the canonical name exceeds the 63-char Kubernetes label limit (71 chars). Shorten to watcher-notif (55 chars) to stay within bounds.

Depends-On: #369

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign dprince for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[centosinfra-prod-github-app]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://gateway-cloud-softwarefactory.apps.ocp.cloud.ci.centos.org/zuul/t/rdoproject.org/buildset/3922a0937c85465e867b6697b4a84517

✔️ openstack-meta-content-provider-master SUCCESS in 2h 33m 57s
❌ watcher-operator-validation-master FAILURE in 1h 43m 45s
✔️ openstack-meta-content-provider-epoxy SUCCESS in 2h 24m 49s
✔️ watcher-operator-validation-epoxy SUCCESS in 2h 03m 12s
❌ watcher-operator-validation-epoxy-ocp4-18 FAILURE in 36m 43s
✔️ noop SUCCESS in 0s
❌ watcher-operator-kuttl FAILURE in 1h 09m 19s

[amoralej]

check-rdo

[centosinfra-prod-github-app]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://gateway-cloud-softwarefactory.apps.ocp.cloud.ci.centos.org/zuul/t/rdoproject.org/buildset/e7ff18724676438b9c0f7ab1ae30df32

✔️ openstack-meta-content-provider-master SUCCESS in 2h 59m 08s
❌ watcher-operator-validation-master FAILURE in 1h 42m 38s
✔️ openstack-meta-content-provider-epoxy SUCCESS in 2h 16m 07s
✔️ watcher-operator-validation-epoxy SUCCESS in 1h 53m 27s
❌ watcher-operator-validation-epoxy-ocp4-18 FAILURE in 36m 08s
✔️ noop SUCCESS in 0s
✔️ watcher-operator-kuttl SUCCESS in 55m 47s