Description of problem:
I'm getting following error when trying to publish blueprint:
{
  "error": {
    "kind": "bad_request",
    "message": "Failed to publish blueprint - undefined method `resource_actions' for nil:NilClass",
    "klass": "Api::BadRequestError"
  }
}

For creating and publishing blueprints I'm following this document -  https://github.com/abellotti/manageiq_docs/blob/api_v230/api/reference/blueprints.adoc

I tried this also with more complete blueprints (with existing service_dialog and service_catalog):
{
  "name": "blueprintavailability",
  "description": "testing",
  "ui_properties": {
    "num_items": 1,
    "visibility": {"id": 800, "name": "Private"},
    "service_dialog": {"id": 1},
    "service_catalog": {"id": 4},
    "chart_data_model": {
      "nodes": [{
         "x": 87,
         "y": 131,
         "id": 10000000000004,
         "icon": "pf pficon-bundle",
         "name": "Deploy RHEL7 with PostgreSQL",
         "tags": [],
         "image": "http://localhost:8001/pictures/10r4.jpg",
         "width": 150,
         "bundle": true,
         "fontFamily": "PatternFlyIcons-webfont",
         "fontContent": "",
         "backgroundColor": "#fff"
      }]
    },
    "automate_entrypoints": {
      "Provision": "Service/Provisioning/StateMachines/ServiceProvision_Template/default",
      "Retirement": "/Service/Retirement/StateMachines/ServiceRetirement/Default",
      "Reconfigure": null
    }
  }
}


Version-Release number of selected component:
5.7.0.17


How reproducible:
100%


Steps to Reproduce:
1. create blueprint:
POST /api/blueprints
{
  "action" : "create",
  "resource" : {
    "name" : "test_blueprint",
    "description" : "Test Blueprint",
    "ui_properties" : {
      "service_catalog"      : {},
      "service_dialog"       : {},
      "automate_entrypoints" : {},
      "chart_data_model"     : {}
    }
  }
}

2. publish blueprint:
POST /api/blueprints/:id
{ "action" : "publish" }