Disallow pulsar tasks: invoke, shell.
Disallow pulsar tasks: invoke, shell.

Adjust error message.

njam/pulsar-rest-api,njam/pulsar-rest-api,vogdb/pulsar-rest-api,cargomedia/pulsar-rest-api,vogdb/pulsar-rest-api,cargomedia/pulsar-rest-api,vogdb/pulsar-rest-api,cargomedia/pulsar-rest-api,njam/pulsar-rest-api,njam/pulsar-rest-api,cargomedia/pulsar-rest-api