Description of problem:
At the output of the `hammer full-help --md` command, some hammer commands have the note `Unfortunately the server does not support such operation.`

The note is misleading because the commands are supported.

There are 8 of such commands:
hammer content-view purge
hammer host errata 
hammer host package
hammer host package-group
hammer host subscription
hammer host-collection erratum
hammer host-collection package
hammer host-collection package-group

Version-Release number of selected component (if applicable):
6.7

How reproducible:
Always

Steps to Reproduce:
1. hammer full-help --md
2. In the output, locate "Unfortunately the server does not support such operation."

Actual results:
The note should note be displayed for the commands.

Expected results:
The note is displayed and is misleading

Additional information:
At the same time, running these individual commands with `--help` does not show this message in the output. For example:
~~~
[root@dell-r430-7 ~]# hammer content-view purge --help
Usage:
    hammer content-view purge [OPTIONS]

Options:
 --async                                 Do not wait for the task
 --count COUNT                           Count of unused versions to keep
                                         Default: 3
 --id ID                                 Content View numeric identifier
 --name NAME                             Content View name
 --organization ORGANIZATION_NAME        Organization name to search by
 --organization-id ORGANIZATION_ID       Organization ID to search by
 --organization-label ORGANIZATION_LABEL Organization label to search by
 -h, --help                              Print help
~~~