Configure console backend with controller 'write' key

It needs it in order to manage system-level roles in lieu of
a controller API that provides that functionality.

Author: Ronen Hilewicz

charts/console/templates/deployment.yaml

@@ -55,7 +55,7 @@ spec:
             - name: DS0_TENANT_ID
               value: {{ .tenant_id }}
             {{- end }}
-            {{- with include "aserto-lib.controllerKeyEnv" (list . "read") }}
+            {{- with include "aserto-lib.controllerKeyEnv" (list . "write") }}
             - name: DS0_ROOT_KEY
               {{- . | nindent 14 }}
             {{- end }}