This change is entirely automated save for the update of some mocks from
'io.open' to '__builtins__.open').
We are keeping this change separate from addition of the actual hook so
that we can ignore the commit later.
Change-Id: I0a9d8736632084473b57b57b693322447d7be519
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
c5b772db76