username param is read by eos action plugion load_provider, if present
it is set as the play context remote user.
That means if you have a play remote_user: admin it won't be used, but instead
whatever is put in the task argument username.
Changing the tests to use name fixes the issue, we may want to remove username
as valid module argument in other change.
* changed collection arg to argregate on 2.4 network modules
* replace users with aggregate in eos_user, junos_user, nxos_user
* added version_added to places where we replaced users with aggregate in the docs
* fix ios_static_route test
* update tests to reference aggregate instead of collection/users
The 'admin' word was being masked by Ansible as potential cred.
Let's just use network-operator since we are just testing here
we can create users in aggregate.
