Next bunch of functional tests adapted to be included in the acceptance
tests.

Inclusion of tests uncovered issue in getting quota related to the fact
that not every user is capable to find/list projects. This is fixed by
introduction of ForbiddenException, skipping it in the _find call and
using current_project_id.

Change-Id: I53e718de239de7fb6f0347ff995282da079c68f3