Fix balance computation and debit/credit for TrialBalance

To compute accumulate previous fiscalyear, dates must be reset and to not
compute accumulate fiscalyear must not be set.

review507003
(transplanted from de306827fd64d40828ba8221f943b7fc552a69a8)

account.py

@@ -718,7 +718,7 @@ class Account(ModelSQL, ModelView):
                         res[account_id] += deferral.debit - deferral.credit
             else:
                 with Transaction().set_context(fiscalyear=fiscalyear.id,
-                        date=None):
+                        date=None, periods=None):
                     res2 = self.get_balance(ids, name)
                 for account_id in ids:
                     res[account_id] += res2[account_id]
@@ -818,7 +818,7 @@ class Account(ModelSQL, ModelView):
                             res[name][account_id] += deferral[name]
             else:
                 with Transaction().set_context(fiscalyear=fiscalyear.id,
-                        date=None):
+                        date=None, dates=None):
                     res2 = self.get_credit_debit(ids, names)
                 for account_id in ids:
                     for name in names:
@@ -1418,7 +1418,7 @@ class TrialBalance(Report):
                     set(start_period_ids)))
 
         with Transaction().set_context(
-                fiscalyear=data['fiscalyear'],
+                fiscalyear=None,
                 periods=end_period_ids,
                 posted=data['posted']):
             accounts = account_obj.browse(account_ids)