Nova volumes do not have a name property but a displayName one, therefore we
modify find_resource() so it looks for this. Then, we modify the test suite
for utils.py so it uses the novaclient.base.ManagerWithFind class for its
FakeManager rather than implementing its own find() method. This way we are
sure that the utils.py functions work correctly with ManagerWithFind and its
way to search in objects list.
FakeResource class is now used, whereas it was not before.
Change-Id: I4c4838250e6987e05022e1607e8d099eb8fb7fff
Signed-off-by: Julien Danjou <julien@danjou.info>
