Merge pull request #1145 from vishh/fix-fs-spec

Set spec.hasFilesystem to true by default for docker containers.

container/docker/handler.go

@@ -287,11 +287,8 @@ func (self *dockerContainerHandler) GetSpec() (info.ContainerSpec, error) {
 	spec.CreationTime = self.creationTime
 
 	if !self.ignoreMetrics.Has(container.DiskUsageMetrics) {
-		switch self.storageDriver {
-		case aufsStorageDriver, overlayStorageDriver, zfsStorageDriver:
 		spec.HasFilesystem = true
 	}
-	}
 
 	spec.Labels = self.labels
 	spec.Envs = self.envs