Bump marshmallow from 2.19.5 to 3.0.1 (#899)

Bump [marshmallow](https://github.com/marshmallow-code/marshmallow) from 2.19.5 to 3.0.1.
- [Release notes](https://github.com/marshmallow-code/marshmallow/releases)
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/dev/CHANGELOG.rst)
- [Commits](https://github.com/marshmallow-code/marshmallow/compare/2.19.5...3.0.1)

http_service/requirements.txt

@@ -4,7 +4,7 @@ flask-apispec==0.8.1
 flask-cors==3.0.8
 Flask==1.1.1
 gunicorn==19.9.0
-marshmallow==2.19.5
+marshmallow==3.0.1
 rq-dashboard==0.5.2
 rq==1.1.0
 cerberus==1.3.1