Pass selfLink to netwrok and subnetwork rather then get network information

[WissemChb]

Summary

This PR is the continuation of a discussion started in this #20. We tested the code as requested and We found a possible fix.

Problem

We get this error when using the driver because we haven't read/list access to shared VPC.

fatal: [localhost]: FAILED! => {"changed": false, "msg": "GCP returned error: {'error': {'code': 403, 'message': \"Required 'compute.networks.list' permission for 'projects/vg1np-core-apps7-90'\", 'errors': [{'message': \"Required 'compute.networks.list' permission for 'projects/vg1np-core-apps7-90'\", 'domain': 'global', 'reason': 'forbidden'}]}}"}

Solution

After a lot of search in the google.cloud.gcp_compute_instance, we found that the network object use selfLink attribute to attach the instance to the network. So, We think it is better to pass the network configuration to the instance using the selfLink rather than get network information that needs permissions to do.

[nbttmbrg]

Cleaner code, tested and works as expected