Added two tests for testing the getRole() function

EV-518

In addition, added a setter method for the private
member variable "loggedInUser", so that it could be
set in the tests.
Added 4 tests testing the getRole function

EV-518
Added rest of getters & setters to AppraisalActions

EV-191

I decided to add the rest of the getters & setters
in case they are needed.
Added tests for isAdminRole() and set it to public

EV-518
Added tests for calculateAssessmentSequence() and made it public

EV-518
Added a test for salaryValidationValues() and set it to public

EV-518
Added test for initialize()

EV-518
Added test for addAssessment()

EV-518

Test requires transaction as an error will be thrown
without one. I believe that this might be causing a problem
with multiple test runs. Currently, the test assumes that nothing
it does is permanently saved, so the next time it is called, it
should have the same results. However, I have not found this to
be the case. It only works if I restart my MAMP servers between
each test run.
Updated addAssessment() test

EV-518
Adding a test for the setAssessmentFields (not done yet)

EV-518
Finished writing the test case for setAssessmentFields()

EV-518
Fixing typo

EV-518
Merge pull request #73 from osu-mist/feature/EV-518-add-tests-appraisals-action

Feature/ev 518 add tests appraisals action