Calendar controller spec
Add test for ArchivedEmployeeAdditionalDetail model
[Closes #51]
Add test for ArchivedEmployeeBankDetail model
[Closes #52]
Add test for ArchivedEmployee model
[Closes #50]
Add test for ArchivedGuardian model
[Closes #55]
Add test for BatchStudent model
[Closes #59]
Add missing model School
Add Calendar Controller test. [Closes #47]
Fix SubjectLeave test model
[Closes #81]