MIFOSX-1161: Adding new properties

Adding fields minRequiredBalance and allowOverdraftMinBalance to
SavingsProduct and SavingsAccount. No enforcement yet.

mifosng-db/migrations/core_db/V175__added_min_required_balance_to_savings_product.sql

@@ -0,0 +1,7 @@
+ALTER TABLE `m_savings_product`
+	ADD COLUMN `min_required_balance` DECIMAL(19,6) NULL AFTER `overdraft_limit`,
+	ADD COLUMN `allow_overdraft_min_balance` TINYINT(1) NOT NULL DEFAULT '0' AFTER `min_required_balance`;
+
+ALTER TABLE `m_savings_account`
+	ADD COLUMN `min_required_balance` DECIMAL(19,6) NULL AFTER `account_balance_derived`,
+	ADD COLUMN `allow_overdraft_min_balance` TINYINT(1) NOT NULL DEFAULT '0' AFTER `min_required_balance`;