require json in spec_helper
require json in spec_helper

When running the tests outside of rake or bundler, the tests fail
because we don't require the json gem before calling `to_json`.

onthespotqa/hipchat-rb,hipchat/hipchat-rb,scalixte-mdsol/hipchat-rb,StatusPage/hipchat-rb,bonusly/hipchat-rb,hipchat/hipchat-rb,banrui/hipchat-rb,bonusly/hipchat-rb,ph/hipchat-rb