Checking webhook fails when all event types are selected
When webhook is configured with all event types then
enabled_events index contains only
*, not all listed event types.
$webhook = Stripe\WebhookEndpoint Object ( [id] => we_ASDFQWEQWE [object] => webhook_endpoint [api_version] => 2015-07-13 [application] => [created] => 1437579495 [enabled_events] => Array (  => * ) [livemode] => [status] => enabled [url] => https://www.example.org/civicrm/payment/ipn/1 )
This generates false positive case in
checkWebhook($webhook) method. And in consequence "Problems detected with Stripe webhook https://www.example.org/civicrm/payment/ipn/1 ..." error message on CiviCRM status page