tests insert and delete for model SurveyCreator
added update test case for SurveyCreator model
Merge branch 'master' into Unit-Testing
Unit test for SurveyResponse model

Insertion, update, and delete(with foreign key constraints)
Unit test case for survey_question table CRUD operations
Merge branch 'master' into Unit-Testing
Added unit test for Survey table CRUD operations
Added comments to the SurveyTest.php
Merge branch 'Unit-Testing' of https://github.com/fydo23/mySurvey into Unit-Testing
Merge branch 'master' into Unit-Testing
Merge branch 'Unit-Testing'