POST for /api/candidates done.

Tested with Postman.

Request:
http://fii-admis-restservice-dt5dd3kc2v.elasticbeanstalk.com/api/candidates
{
"first_name":"Ionut",
"last_name":"Popescu",
"social_id":"347389523255435",
"gpa_grade":9.3,
"a_test_grade":8.9
}

Response:
201 Created
Location:
http://fii-admis-restservice-dt5dd3kc2v.elasticbeanstalk.com/api/api/candidates/Nxa7