RC-Review-1: Commonalities version

[FabrizioMoggio]

Commonalities version added.

What type of PR is this?

• documentation

What this PR does / why we need it:

To be aligned with Commonalities guidelines

Which issue(s) this PR fixes:

#66

[hdamker]

@FabrizioMoggio: Is it by intention to go back to alpha.1 within this PR? Or is the change back from rc.1 to alpha.1 the result of using a wrong base for the PR?

The field x-camara-commonalities: 0.4.0 which is mentioned in the PR title seems not to be in yet.

Another observation in the documentation:

[**https://tim-api.developer.tim.it/callforwardingsignal**](https://tim-api\
    .developer.tim.it/callforwarding\signal)\

looks like a bad example ... first as it is company specific (example.com would be of help here), and second as the API name has to be call-forwarding-signal, see the server definition:

- url: "{apiRoot}/call-forwarding-signal/v0.2alpha1"
    variables:
      apiRoot:
        default: http://localhost:9091

[FabrizioMoggio]

sorry. uploaded the wrong version

[FabrizioMoggio]

uploaded the wrong version