Change exception raised to Forbidden on trust_id

Change-Id: I30f89d52ade45335d2f29b8454438d0dd3b20a97
from tests import

Makes the resolution of local imports work
when running individual tests.

Bug 1152326

Change-Id: I72f54bdbb60a6d7acf32bdbdc02d7bce69add84e
Merge "Change exception raised to Forbidden on trust_id"
Merge "from tests import"