Reproduce bug #529968.
* bzrlib/tests/test_conflicts.py:
(OldTestResolveContentConflicts): Remove blackbox tests.
(TestResolveContentConflicts.test_resolve_taking_this): Ensure we
end up with the right path for the file when the conflict is
resolved.
(TestResolveContentConflicts.test_resolve_taking_other): Ensure we
end up with no file after the conflict is resolved.