Avoid crash with namespaces and multiple_archives

If allow_multiple_archives is used, a model namespaced Foo::Bar would
create a line containing an expression archived.foo/bar_id which
causes a crash in copy_self_to_archive. This patch fixes the problem
by using archived.bar_id and dropping the namespace.
Fix some more problems in order to handle namespaced models correctly

This should work for single as well as multiple archive modes.
update Gemfile.lock

Signed-off-by: Tyler Pickett <t.pickett66@gmail.com>
run bundle update

Signed-off-by: Tyler Pickett <t.pickett66@gmail.com>
assert_nothing_raised has to be the most useless assertion ever

But really, there is  a reason it was removed from
TestUnit and Minitest.

Signed-off-by: Tyler Pickett <t.pickett66@gmail.com>
bump patchlevel

Signed-off-by: Tyler Pickett <t.pickett66@gmail.com>