Disable Metadata write operations on v1.1

This is the first step towards removing metadata completely from the
API. This is temporary until we decided whether we will remove read
operations too.

Partially-Implements: api-v1.1-remove-queue-metadata

Change-Id: I18b8b7a9284b37d866dec7ab1f8117dc779431f8
Merge "Disable Metadata write operations on v1.1"