Change default EdgeCluster name

[GraysonWu]

No description provided.

[ksamoray]

In the new topologies which I deploy with Terraform, the names are actually lowercased :)
If we want to use uppercase naming, I'll change that as well.

[salv-orlando]

These are not NSX defaults, but rather default settings for the process used to deploy NSX. As @ksamoray mentioned, we will shortly start using topologies deployed via Terraform and defaulting to lower case names.

Also, any NSX user should be able to run these tests on their own topology and have a different name for the edge cluster to use in tests.
If the above makes sense, perhaps these constants should become variables that are read from a config file.

As this might take time for the time being can use two values depending on backend NSX version?

[ksamoray]

@salv-orlando these values are just default names which are used in the testing environments, the CI sets these with environment vars and I already changed the topology to use uppercase values as the GM testing deployments use.

[salv-orlando]

Discussed with @ksamoray and @annakhm - it's fine to change default value for edge cluster names, but there is no reason for updating documentation.

[GraysonWu]

/test-all

[ksamoray]

/test-all

[ksamoray]

/test-all