slapos_cloud: Fixup allocation when Subscription Related Slave Instance

   If the Slave Instance is root instance, we should allocated exclusivelly on Subscription defined computers/instances

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/Person_findPartition.py

@@ -92,6 +92,11 @@ query_kw["capacity_scope_uid"] = portal.portal_categories.capacity_scope.open.ge
 if subscription_reference is not None and software_instance_portal_type != "Slave Instance":
   # Subscriptions uses a specific set of allocation scope
   query_kw["allocation_scope_uid"] = portal.portal_categories.allocation_scope.open.subscription.getUid()
+elif subscription_reference is not None and \
+     software_instance_portal_type == "Slave Instance" and \
+     is_root_slave:
+  # Subscriptions uses a specific set of allocation scope
+  query_kw["allocation_scope_uid"] = getOpenAllocationScopeUidList([])
 else:
   # else pic anything but open/subscription
   query_kw["allocation_scope_uid"] = getOpenAllocationScopeUidList(

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/Person_findPartition.xml

@@ -50,7 +50,7 @@
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string>software_release_url, software_type, software_instance_portal_type, filter_kw, computer_network_query=None, subscription_reference=None,test_mode=False</string> </value>
+            <value> <string>software_release_url, software_type, software_instance_portal_type, filter_kw, computer_network_query=None, subscription_reference=None, is_root_slave=False, test_mode=False</string> </value>
         </item>
         <item>
             <key> <string>id</string> </key>

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/SoftwareInstance_tryToAllocatePartition.py

@@ -94,7 +94,8 @@ def assignComputerPartition(software_instance, hosting_subscription):
         shadow_document=person,
         callable_object=person.Person_findPartition,
         argument_list=[software_instance.getUrlString(), software_instance.getSourceReference(),
-        software_instance.getPortalType(), sla_dict, computer_network_query, subscription_reference])
+        software_instance.getPortalType(), sla_dict, computer_network_query,
+        subscription_reference, hosting_subscription.isRootSlave()])
     return computer_partition_relative_url, tag
 
 software_instance = context
@@ -113,9 +114,9 @@ try:
     hosting_subscription.activate(activity="SQLQueue", tag=tag,
         after_tag="allocate_%s" % computer_partition_url).getId()
 
-except ValueError:
+except ValueError, e:
   # It was not possible to find free Computer Partition
-  markHistory(software_instance, 'Allocation failed: no free Computer Partition')
+  markHistory(software_instance, 'Allocation failed: no free Computer Partition %s' % e)
 except Unauthorized, e:
   # user has bad balance
   markHistory(software_instance, 'Allocation failed: %s' % e)