ACID Violation: CHC PUT Deletes Existing Configuration on Invalid Payload

[ErikGaida]

1. Create PS
2. Create CHC
   2.1. GET CHC for PS from step 1.
3. PUT {{m1_url}}/3gpp-m1/v2/provisioning-sessions/{{provisioning_session_id}}/content-hosting-configuration
   body for 3:

{
    "name": "Test CHC Invalid Update",
    "distributionConfigurations": [
        {
            "contentPreparationTemplateURLs": {
                "urlTemplate": "http://example.com/{provisioningSessionId}/manifest.m3u8"
            },
            "entryPoint": {
                "relativePath": "/starts-with-slash-is-invalid",
                "contentType": "application/x-mpegURL"
            }
        }
    ]
}

3.1 see 400 From step 3.
4. do again GET CHC for PS from step 1.
5. See 404 from step 4. the CHC is deleted