remove hard-coded ns (#1820)

Remove hard-coded ns in Rancher rolebinding

Author: jharrod

helm/trident-operator/templates/clusterrolebinding-rancher.yaml

@@ -10,5 +10,5 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: trident-operator
-    namespace: trident
+    namespace: {{ .Release.Namespace }}
 {{- end }}