allow adjusted transactions to be zeroed, ensure inArrearsTolerance is nullable and does not need to be provided.

mifosng-db/patches/patch-0008-alter-loan-transaction-derived-columns-to-be-nullable.sql

@@ -0,0 +1,8 @@
+alter table m_loan_transaction modify column principal_portion_derived decimal(19,6);
+
+alter table m_loan_transaction modify column interest_portion_derived decimal(19,6);
+
+alter table m_loan_transaction modify column charges_portion_derived decimal(19,6);
+
+
+alter table m_product_loan modify column arrearstolerance_amount decimal(19,6);