There is a missing relation between vault and ceilometer

[Heather Lemon]

When deploying a bundle with vault and gnocchi, there is a missing relation between vault and ceilometer.
./generate-bundle.sh --release queens --series bionic --telemetry-gnocchi --create-model --name cert-foo --designate --vault

# We see this on deployment
ceilometer/0* blocked executing 1 10.5.0.179 Run the ceilometer-upgrade action on the leader to initialize ceilometer and gnocchi

After executing:
juju run-action ceilometer/0 'ceilometer-upgrade'
We have this error in the logs:
```DEBUG unit.ceilometer/0.ceilometer-upgrade 2020-10-13 21:50:07.111 2602 WARNING keystoneauth.identity.generic.base [-] Failed to discover available identity versions when contacting https://10.5.2.229:5000. Attempting to parse version from URL.: SSLError: SSL exception connecting to https://10.5.2.229:5000: HTTPSConnectionPool(host='10.5.2.229', port=5000): Max retries exceeded with url: / (Caused by SSLError(SSLError(1, u'[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:727)'),))```

Testing: you see that the vault/celiometer relation is missing
juju status ceilometer --relations

Adding `juju add-relation ceilometer vault`
fixes this issue

[Heather Lemon (hypothetical-lemon)]

attached is the bundle i used