Fixed: Codebuild Webhook Filters are to be a list of list of WebhookFilter (#1372)
Fixed: Codebuild Webhook Filters are to be a list of list of WebhookFilter (#1372)

* Fixed: Codebuild Webhook Filters are to be a list of list of WebhookFilter
According to documentation, Web Hooks should be written in the form of List of List of WebHooks
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-codebuild-project-projecttriggers.html
cloudtools/troposphere,cloudtools/troposphere,ikben/troposphere,ikben/troposphere,johnctitus/troposphere,johnctitus/troposphere