erp5_core: Expand simulation with priority 3

 Move Simulation to priority 3 helps to not block/delay immediateReindex
 on a scenario where everything is expanding. We use priority 3 to match
 what is used in SimulableMixin.updateSimulation and Delivery.localBuild

product/ERP5/bootstrap/erp5_core/DocumentTemplateItem/portal_components/document.erp5.Delivery.py

@@ -41,7 +41,8 @@ from Products.ERP5Type.XMLObject import XMLObject
 from erp5.component.document.ImmobilisationDelivery import ImmobilisationDelivery
 from erp5.component.mixin.AmountGeneratorMixin import AmountGeneratorMixin
 from erp5.component.mixin.CompositionMixin import CompositionMixin
-from erp5.component.mixin.SimulableMixin import SimulableMixin
+from erp5.component.mixin.SimulableMixin import SimulableMixin, \
+    SIMULATION_PRIORITY
 from Products.ERP5Type.UnrestrictedMethod import UnrestrictedMethod, \
     unrestricted_apply
 from erp5.component.interface.IMovementCollection import IMovementCollection
@@ -669,7 +670,7 @@ class Delivery(XMLObject, ImmobilisationDelivery, SimulableMixin,
     # XXX: Previous implementation waited for expand activities of related
     #      documents and even suggested to look at explanation tree,
     #      instead of causalities. Is it required ?
-    kw = {'priority': 3}
+    kw = {'priority': SIMULATION_PRIORITY}
     kw.update(activity_kw)
     after_tag = kw.pop('after_tag', None)
     if isinstance(after_tag, basestring):

product/ERP5/bootstrap/erp5_core/MixinTemplateItem/portal_components/mixin.erp5.SimulableMixin.py

@@ -35,6 +35,8 @@ from Products.ERP5Type.Base import Base
 from Products.ERP5Type.TransactionalVariable import getTransactionalVariable
 from Products.ERP5Type.Errors import SimulationError
 
+SIMULATION_PRIORITY = 3
+
 class SimulableMixin(Base):
   security = ClassSecurityInfo()
 
@@ -69,7 +71,7 @@ class SimulableMixin(Base):
               activity='SQLQueue',
               group_method_id='portal_rules/updateSimulation',
               tag='build:' + path,
-              priority=3,
+              priority=SIMULATION_PRIORITY,
               )._updateSimulation(**kw)
         del tv[key]
         ignore.update(kw)
@@ -97,7 +99,9 @@ class SimulableMixin(Base):
       if applied_rule is None:
         applied_rule = self._createRootAppliedRule()
         expand_root = applied_rule is not None
-    activate_kw = {'tag': 'build:'+self.getPath()}
+    activate_kw = {'tag': 'build:'+self.getPath(),
+     'priority': SIMULATION_PRIORITY
+    }
     if expand_root:
       applied_rule.expand(activate_kw=activate_kw)
     else: