CLOUDSTACK-4128: UI > zone wizard > secondary storage step > provider "S3" > Create NFS staging is required for S3 at this moment. So, disallow user to uncheck "Create NFS Secondary Staging" checkbox when provider is "S3".
Committing review 13891.
CLOUDSTACK-4693: UI > Network > Add Guest Network dialog > physical network dropdown - populate only physical networks that have Guest traffic type.
Fixing the RAT exclusions after the refactor from 6c261042821c5597dab8d6be85dc59c948424e13