Description of problem:
request:

method POST

url: "https://api.stage.openshift.com/api/assisted-install/v1/clusters/{cluster_id}/actions/complete_installation

X-Secret-Key: another user's pull secret

body:{ "is_success": true }

when cluster is in state "installing" repose:

409  "no condition passed to run transition CompleteInstallation from state installing"

when cluster was in state "finalizing" the request was accepted and set the cluster state to "installed"

I would expect the response in both cases to be 404 "record not found"

Version-Release number of selected component (if applicable):
{
    "release_tag": "v1.0.9.2-ds",
    "versions": {
        "assisted-ignition-generator": "quay.io/ocpmetal/assisted-ignition-generator:v1.0.9.2",
        "assisted-installer": "registry-proxy.engineering.redhat.com/rh-osbs/openshift4-assisted-installer-rhel8:v4.6.0-16",
        "assisted-installer-controller": "registry-proxy.engineering.redhat.com/rh-osbs/openshift4-assisted-installer-reporter-rhel8:v4.6.0-12",
        "assisted-installer-service": "quay.io/app-sre/assisted-service:b2bb440",
        "discovery-agent": "registry-proxy.engineering.redhat.com/rh-osbs/openshift4-assisted-installer-agent-rhel8:v4.6.0-12",
        "image-builder": "quay.io/app-sre/assisted-iso-create:b2bb440"
    }
}

How reproducible:
every time

Steps to Reproduce:
1. Create Cluster
2. Generate and dowload ISO
3. Boot nodes into ISO
4. Start Cluster installation
5. Make the following API request (substituting the cluster_id):
url: "https://api.stage.openshift.com/api/assisted-install/v1/clusters/{cluster_id}/actions/complete_installation
"

X-Secret-Key: another user's pull secret

body:{ "is_success": true }
6. Make the same request when the cluster is in state finalizing

Actual results:
when cluster is in state "installing" repose:

409  "no condition passed to run transition CompleteInstallation from state installing"

when cluster was in state "finalizing" the request was accepted and set the cluster state to "installed"

Expected results:
Request is rejected 404 "record not found"

Additional info: