cloudstack: fix cs_instance can not find iso and disk offering if domain is set.

This does only affect root admins.

cloud/cloudstack/cs_instance.py

@@ -388,6 +388,7 @@ class AnsibleCloudStackInstance(AnsibleCloudStack):
         args['domainid']    = self.get_domain('id')
         args['projectid']   = self.get_project('id')
         args['zoneid']      = self.get_zone('id')
+        args['isrecursive'] = True
 
         if template:
             if self.template:
@@ -421,10 +422,7 @@ class AnsibleCloudStackInstance(AnsibleCloudStack):
         if not disk_offering:
             return None
 
-        args                = {}
-        args['domainid']    = self.get_domain('id')
-
-        disk_offerings = self.cs.listDiskOfferings(**args)
+        disk_offerings = self.cs.listDiskOfferings()
         if disk_offerings:
             for d in disk_offerings['diskoffering']:
                 if disk_offering in [ d['displaytext'], d['name'], d['id'] ]: