Refactor code
Add test cases for verification method
Complete test cases in InstructorsLogic
Move createInstructorAccount() test case from Logic to AccountsLogic
Remove redundant import
Merge branch 'master' into Issue1946
Rename method
Add ignoreExpectedException() into empty catch block
Merge branch 'master' into Issue1946
[1946] Clean up InstructorsLogic

fixes #1946