clusterctl: Replica count env vars are not used

[wfernandes]

What steps did you take and what happened:

1. Use the following cluster-template.yaml
2. Move this file to the appropriate location in the overrides directory
   • /Users/wfernandes/.cluster-api/overrides/infrastructure-aws/v0.5.0/cluster-template-kcp.yaml
3. Set the aws provider url in ~/.cluster-api/clusterctl.yaml

   •   name: "aws"
       url: "/Users/wfernandes/.cluster-api/overrides/infrastructure-aws/v0.5.0/infrastructure-components.yaml"
       type: "InfrastructureProvider"
     

4. After setting all the required env vars including CONTROL_PLANE_MACHINE_COUNT and WORKER_MACHINE_COUNT, run clusterctl config cluster kcp-test --flavor kcp.
5. Notice that the values of the replicas are 1 and 0 respectively. Which are the defaults of the flags --control-plane-machine-count and --worker-machine-count.
6. If the flags are used, then the replicas are set correctly.

What did you expect to happen:
Expected that the COUNT env var values to be used.

/kind bug
/area clusterctl

[vincepri]

/milestone v0.3.x

[gab-satchi]

/assign

[gab-satchi]

/lifecycle active