builder: Add possibility to specify from date for test purpose

bt5/erp5_base/MixinTemplateItem/portal_components/mixin.erp5.BuilderMixin.py

@@ -300,6 +300,7 @@ class BuilderMixin(XMLObject, Amount, Predicate):
       **kw):
     from Products.ERP5Type.Document import newTempMovement
     portal = self.getPortalObject()
+    if not from_date:
       from_date = DateTime().earliestTime()
 
     # Initiate Conditions taken from Yusei T. Original Script