cloudstack: cs_instance do not pass zoneid to listVirtualMachines

This change is related to 2 issues;

- The API does not return destroyed VMs if zone ID is passed for CS version < 4.5.2. Also see CLOUDSTACK-8578. This only affects domain and root admins.
- The instance name must be unique across all zones. If we pass the zone ID to find  a VM, it will not be found if it is in a different zone but a deployment with the name would fail.

lib/ansible/modules/extras/cloud/cloudstack/cs_instance.py

@@ -439,8 +439,7 @@ class AnsibleCloudStackInstance(AnsibleCloudStack):
             args['account']     = self.get_account(key='name')
             args['domainid']    = self.get_domain(key='id')
             args['projectid']   = self.get_project(key='id')
-            args['zoneid']      = self.get_zone(key='id')
-
+            # Do not pass zoneid, as the instance name must be unique across zones.
             instances = self.cs.listVirtualMachines(**args)
             if instances:
                 for v in instances['virtualmachine']: