Edited grade test in student_test

-Edited the grade_integer test in student_test.rb so it'll test for an int instead of a string. 
-Added test for allergies
-Started adding more to the tests for forms like birth certificate. Trying to figure out the regex to check a file path so I'll update when I figure it out.

Currently, it says 85 files changed even though these files were changed a while back. If merging this request will cause a conflict, we could just close it and figure it out from there.