Add '127.0.0.1' to copied bridgedb.conf in .travis.yml.
Add '127.0.0.1' to copied bridgedb.conf in .travis.yml.

This is necessary to run the tests in `lib/bridgedb/test/test_smtp.py`, and
shouldn't be set on production servers. It's done with a sed command in the
`.travis.yml` file to a copied bridgedb.conf so that it doesn't ever end up in
a production config file.

pagea/bridgedb,pagea/bridgedb