Add the `vmware/scenario/vcenter_only` alias to be able to identify the
vmware test roles that can be tested with just on vcenter instance.
Also, add a check to be sure we don't try to attach ESXi hosts if none
has been defined.
* Make datacenter as alias and optional
* Add folder param to place datastore cluster in specific folder
* Updated examples
* Updated tests
Fixes: #48010
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* Update Shippable integration test groups.
* Update integration test group aliases.
* Rebalance AWS and Azure tests with extra group.
* Rebalance Windows tests with another group.