The quota list tests have a race in them where occasionally a project is
deleted in another test between the time that quota list gets a list of all
projects and it gets the quota for the projects from the service; the get
quota call fails on the non-existant project.
The quota list functional tests have been substantially re-written to
properly test the exception handling.
Change-Id: I71e6bbb5d46fcea4718a5a870f9a66a2c20fff0f
d930b043ee