We are using CAPMVM through WGE and can not create clusters that have '-' in the name

**What happened:**
[A clear and concise description of what the bug is.]
An request to create a cluster wtih '-' in the name like 'paul-mvm-36' will fail. The initial control plane machine gets deployed, but I can never reach the kubernetes api-server.

**What did you expect to happen:**
Provisioning should work and it should not matter if we have a '-' in the cluster name or not.

**How to reproduce it:**
Go to [the demo environment](http://demo.weavegitops.com) and deploy a cluster. Follow the instructions [in this doc](https://docs.google.com/document/d/1WHo_9xgLtvc6pL1OGNTZ5MwdJqBvT7QbAfDuZI_v_BE/edit#)

**Environment:**

- capmvm version:0.4.0

Reproduce the failure by deploying a cluster named `paul-mvm-36` in the linked demo environment, following the referenced instructions. Trace why the control plane starts but the Kubernetes API server remains unreachable when the name contains `-`; done means provisioning succeeds for hyphenated cluster names as well as names without hyphens.

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