Add lookup plugin to use native api

[tanganellilore]

Hi team,

In this PR I added the functionality to use native API via lookup plugin.
I'm simply inspired from AWX controller_api so the implementation it's very simple and without special checks.

Lookup working like controller_apu lookup, ex:

- name: List all Virtual Machines from the API
  set_fact:
    virtual_machines: "{{ lookup('ngine_io.cloudstack.api', 'listVirtualMachines') }}"

- name: List specific Virtual Machines from the API
  set_fact:
    virtual_machines: "{{ lookup('ngine_io.cloudstack.api', 'listVirtualMachines', query_params={ 'name': 'myvmname' }) }}"

This is very usefull for usecase like listing elements or simply query the api, without any logic that generally is present on a module (like automatic retrival of id from a name).

Let me know it this can be a good starting point.

Thanks

[tanganellilore]

@resmo have you see that?

[resmo]

Hi @tanganellilore

Thanks for pinging me. I added myself as reviewer.

In general, I agree with this functionality. However, I'm in the middle of a major refactoring (see #141) that will be done by about the end of the year. Would it be ok to take a look at this PR when the dust has settled a bit?

[tanganellilore]

Hi @resmo ,

no problem, in the meantime i will use my fork with this enhancement.
let me say, is very, very simple, I create a litte wrapping to cs library, without adding logic or something similar

[resmo]

Thanks for your suggestion. I'd like to have this lookup plugin merged for 3.0.0. However, I wonder why you created another module_utils for it. Can you explain?

[resmo]

@tanganellilore please rebase

[tanganellilore]

Hi,

to due different init and api function, moreover, to separate lookup/api module to other module.

Api lookup is very flexible without any specific check.

[resmo]

sorry again, could you please rebase again git rebase upstream/master then force push git push -f origin add_api_lookup again. Thanks.

[resmo]

LGTM, I may re-arrange code a bit but it's good for now.