Move the _warn_if_deprecated call from repo.__init__ to repo.lock_{read,write} so that branch.lock_{read,write} can call it. This makes it possible to access locations.conf and branch.conf.
* bzrlib/tests/blackbox/test_exceptions.py: (TestDeprecationWarning): Test that the suppress_warning configuration variable is taken into account.
* bzrlib/repository.py: (Repository.__init__): Delete very old and obsolete comments. Don't warn about deprecations yet. (Repository.lock_write, Repository.lock_read): The repo is about to be locked, check deprecation. (Repository._warn_if_deprecated): Use the branch config if available or the global one othewrwise and check for the suppress_warning variable.
* bzrlib/remote.py: (RemoteRepository._warn_if_deprecated): Nothing to do here.
* bzrlib/repofmt/pack_repo.py: (KnitPackRepository._warn_if_deprecated): Delegate to base class if needed.