Change the edx-forked DRF requirement to v3.6.3.

requirements.txt

 dogapi==1.2.1
 django-extensions==1.5.9
 django-model-utils==2.3.1
-# Use the same cherry-picked repo as edx-platform
-#djangorestframework>=3.1,<3.2
-git+https://github.com/edx/django-rest-framework.git@3c72cb5ee5baebc4328947371195eae2077197b0#egg=djangorestframework==3.2.3
+# Use the same DRF version as edx-platform
+git+https://github.com/edx/django-rest-framework.git@1ceda7c086fddffd1c440cc86856441bbf0bd9cb#egg=djangorestframework==3.6.3
 jsonfield==1.0.3
 pytz