[issue871] Fix Google Code Bug Importer

Continuation of #50. @paulproteus and I are pairing on a CR and we will merge this tonight.
So we're setting `bug_list` in the context of these older bugs (see comment line 71) but we're not actually reading this value anywhere, similar to the `bug_urls` situation. Additionally, there is no test coverage for either of these cases. At minimum we should be testing this stuff; it's also possible that YAGNI applies here...