Description of problem:

"satellite-maintain plugin purge-puppet" commands fails mentioning disable Puppet from Satellite along external capsule/proxy first

How reproducible:

Is this issue a regression from an earlier version:

Yes, regression in Satellite 6.17 snap 1.1 from stream snap 89

Steps to Reproduce:

1. Setup Satellite 6.17 with Capsule and Puppet enabled on both

2.

# satellite-maintain plugin purge-puppet
Running Remove Puppet feature
================================================================================
Check for Puppet capsules from the database:
You have proxies with Puppet feature enabled, please disable Puppet on all proxies first.
The following proxies have Puppet feature: <satellite-fqdn>, <capsule-fqdn>.                                                                      [ABORTED]
--------------------------------------------------------------------------------
Scenario [Remove Puppet feature] failed.The processing was aborted by user during the following steps:  [puppet-capsules]
 

Actual behavior:

"satellite-maintain plugin purge-puppet" commands fails mentioning disable Puppet from Satellite along external capsule/proxy first

Expected behavior:

"satellite-maintain plugin purge-puppet" commands should fail only with mentioning disable Puppet on external capsule/proxy first

Business Impact / Additional info:

We already have test coverage for this which identified this bug, and it can be used to verify when fixed.

https://github.com/SatelliteQE/robottelo/blob/master/tests/foreman/destructive/test_puppetplugin.py#L55