Fix search_fields in education app

Ghost User
2017-03-29T20:17:23+02:00

Closes #359 It's not possible to search within `course` and `uploader` because these fields are not strings. Before: 1. Search in the exam or summary model 2. Get an icontains error After: 1. Search in the exam or summary mo...

Closes #359 (closed)

It's not possible to search within course and uploader because these fields are not strings.

Before:

1. Search in the exam or summary model

2. Get an icontains error

After:

1. Search in the exam or summary model

2. No errors, appropriate results