Adding models is currently broken in JIMM

[tcuthbert]

Problem: Adding a model to JIMM fails. juju responds with: context deadline exceeded.

graph LR
subgraph "OpenStack"

subgraph JAAS["JAAS Environment"]
    jc[JIMM/Candid]
end
subgraph Staging["Staging Environment"]
    jc-.->controller-.->model
end

end
Juju-."juju add-model".->jc
model x-.-x Juju

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Steps to reproduce: The juju client times out when running the juju add-model command. The model is inconsistently created on the controller -- verified as the admin user of the upstream controller with juju models --all.

JIMM is able to update the user's cloud credentials -- verified by juju update-credentials ${CLOUD} --controller ${JIMM_URL} returning a list of models that my cloud credentials are valid for.

Deployment:

Component	Version
jimm	v0.36.5+git17.27d6938-dirty
candid	v1.11.0+git34.056e8fd
juju client	2.9.38
jaas model	2.9.32
controller	2.9.38

[alesstimec]

Addressed by #903