[WFLY-490] A custom PermissionCollection where no permissions are identified, to avoid NPEs where no Permissions found.
[WFLY-490] An update to the FileSystemDeploymentService to check the result of the composite operation before attempting to access individual results.

Additional changes will be required in this are for access control to allow deployments from an in-vm process - however code calling a composite operation should at least be able to cope with it not succeeding.