[frontend/backend] coded functionality into buttons for viewing Transactions based on filtered elements

[dao backend] modified TransactionDAO.java to include SQL for roles; displayed all necessary transaction data to viewTransactionLogs.jsp; created necessary bean and loader to support roles

returning PatientBean.java to original form with no code smells and pushing code refactoring to a seperate branch

Three code smells identified and fixed. 1- multiple occurrences of the same string literal "MM/dd/yyyy". 2- ageInMs calculation longer than 100 lines. 3- age conversion uses multiple magic numbers.

Added new CauseOfDeathTrendsReportBean class to persist report results data in bean