When running some tests from test_restapi.py, the following error happens:
TypeError: unorderable types: NoneType() < int()
In Python 2, comparing NoneType and integers is possible:
>>> None < 2
True
But in Python 3, it's not allowed. Fix this by using a default status code.
Change-Id: Ic0fad5c68f3bf2dd8a2b98423549903f982192c9