All enhancements are completed and tests were added

CustomerTest
Added tests for the Maxisavings Enhancement of 0.5% rate and 0.1% rate
if there was a prior withdrawal within 10 days
Note that interest accrues daily including weekends
Revert "All enhancements are completed and tests were added"

This reverts commit 32d77427814c05d4f76871e6aaddbecaeaa36bc9.