Adding summary for number of resources, racks and health states to Provider

[EsdrasVP]

This PR is able to:

• Add a counter for the number of resources on a Physical Infrastructure Provider
• Add a counter for the number of health states on a Physical Infrastructure Provider

This should be displayed at the API by accessing

• /api/providers/:id?attributes=resources_info
• /api/providers/:id?attributes=health_state_info

If both are accessed, the response is presented as follows:

{
    "resources_info": {
        "total_racks": 100,
        "total_resources": 200
    },
    "health_state_info": {
        "total_valid": 150,
        "total_warning": 30,
        "total_critical": 20
    }
}

[EsdrasVP]

@miq-bot assign @agrare

[gtanzillo]

Where are you planning on using this virtual column? It's defined as :string but the method returns a hash.

[EsdrasVP]

@gtanzillo The intention is to add it to the physical infra provider JSON response at the ManageIQ API. I put it as a :string because there is no type :hash for virtual columns. What I could do is do create these columns as :json, I didn't do it before because I didn't know it was possible. What do you think of that? It's more accurate, and fit to the purpose, then :string.

[gtanzillo]

@EsdrasVP Yes, I think that the :json type makes more sense here and I would go with that.

[EsdrasVP]

@gtanzillo Great, I made the change, so :json will be used instead of :string.

[miq-bot]

Checked commit EsdrasVP@5ed1437 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 3 offenses detected

app/models/manageiq/providers/physical_infra_manager.rb

• ⚠️ - Line 51, Col 7 - Lint/UselessAssignment - Useless assignment to variable - count. Use + instead of +=.
• ⚠️ - Line 68, Col 9 - Lint/UselessAssignment - Useless assignment to variable - count.
• ⚠️ - Line 74, Col 9 - Lint/UselessAssignment - Useless assignment to variable - count.

[gtanzillo]

LGTM 👍