{
    "volume": ["name~", "status", "metadata",
               "bootable", "migration_status", "availability_zone",
               "group_id", "user_id"],
    "backup": ["name", "status", "volume_id"],
    "snapshot": ["name~", "status", "volume_id", "metadata",
                 "availability_zone"],
    "group": [],
    "group_snapshot": ["status", "group_id"],
    "attachment": ["volume_id", "status", "instance_id", "attach_status"],
    "message": ["resource_uuid", "resource_type", "event_id",
                "request_id", "message_level"],
    "pool": ["name", "volume_type"]
}

{
    "volume": ["name~", "status", "metadata",
               "bootable", "migration_status", "availability_zone",
               "group_id", "user_id"],
    "backup": ["name", "status", "volume_id"],
    "snapshot": ["name~", "status", "volume_id", "metadata",
                 "availability_zone"],
    "group": [],
    "group_snapshot": ["status", "group_id"],
    "attachment": ["volume_id", "status", "instance_id", "attach_status"],
    "message": ["resource_uuid", "resource_type", "event_id",
                "request_id", "message_level"],
    "pool": ["name", "volume_type"],
    "volume_type": ["is_public"]
}

Add required resource filter for volume type
[Cinder] Add required resource filter for volume type

For Cinder train the /etc/cinder/resource_filters.json file
needs the entry for volume type, otherwise end uses can't
even get a list of volume types.

Without it non admins that run "cinder type-list" get the
following error.
ERROR: Invalid filters is_public are found in query options.

The feature/requirement was backported to train
https://github.com/openstack/cinder/blob/stable/train/etc/cinder/resource_filters.json#L14
