The json returned from `/v2/apps` has changed. At a min it breaks our SI tests.
We need to determine if this is an expected / desired change (and then fix our SI tests `test_default_user`) . or if this change is unexpected resulting in a need to fix Marathon 1.5.
Results from Marathon 1.5.0-SNAPSHOT-557-gab275cc
Results from Marathon 1.4.2
notice 1.4.2 has a "user" : null
It appears that all null elements are missing which includes: args, container, residency, taskKillGracePeriodSeconds, ipAddress