Function cleanUp

test/tests/signature.js:48–53

()

    var savedUserEmail;

    var cleanUp = () => {
      return exec("git config --global user.name \"" + savedUserName + "\"")
      .then(() => {
        exec("git config --global user.email \"" + savedUserEmail + "\"");
      });
    };

    return exec("git config --global user.name")
    .then((userName) => {