Fix for kustomization fails with version >= 3.0.0 because namespace

This fix is related to unable to deploy nfd with kustomization due to overlays not specifying a namespace

Signed-off-by: Liu, Rachel A <rachel.a.liu@intel.com>

Author: Rachela999

gpu-aware-scheduling/docs/nfd/kustom/env_vars.yaml

@@ -2,6 +2,7 @@ apiVersion: apps/v1
 kind: DaemonSet
 metadata:
   name: nfd-worker
+  namespace: node-feature-discovery
 spec:
   template:
     spec:

gpu-aware-scheduling/docs/nfd/kustom/external_resources.yaml

@@ -2,6 +2,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: nfd-master
+  namespace: node-feature-discovery
 spec:
   template:
     spec: