Refactor(AccountOperations): rename to AccountBalanceTransaction;;
remove dependency currentUser;
change signature of methods deposit and withdraw to accept and account object as first argument.

Refactor(UserAccountDAO): rename getAccount argument to accountId and change its type to int.
Refactor(DepositServlet): rename to TransactionServlet.
Modify(TransactionServlet): repurpose servlet to call either a deposit ot withdraw transaction.
FIx(HomeServlet): adjust for new userAccountDAO.getAccount signature - pass account.getId() instead of just the account object.
Refactor: move account related classes to new package account.
Refactor: rename package usermanagement to user
Fix(PersistentUserAccountDAORule): fix broken account type.
Fix(PersistentUserAccountDAOTest).