message: fix the git seeds blueprint
  newer nodegit has differences in exception message case. We already handled them within the hub itself, but the blueprint needs this too.
diff: @@ -23,7 +23,7 @@ module.exports = {
  ui.writeInfoLine("Not creating branch cs-master because it exists");
  return;
  } catch (err) {
  - if (!/Cannot locate local branch/.test(err.message)) {
  + if (!/Cannot locate local branch/i.test(err.message)) {
  throw err;
  }
  let oid = await Reference.nameToId(repo, 'HEAD');
  