* migrated tests in roles_test.go to use testify * format file * format file and edit some test statements * change some require statements to assert * remove extra t.Fatal * test error on response * use require.NotEmpty
* migrated tests in roles_test.go to use testify * format file * format file and edit some test statements * change some require statements to assert * remove extra t.Fatal * test error on response * use require.NotEmpty