Document BZ# 2087067 as a know issue

Once we use `satellite-maintain plugin purge-puppet` command with  `--remove-all-data`  or `-f` option,  we cannot expect to enable the puppet-plugin back by following https://access.redhat.com/documentation/en-us/red_hat_satellite/6.11/html/managing_configurations_using_puppet_integration_in_red_hat_satellite/introducing-configuration-management-using-puppet_managing-configurations-puppet#Enabling_Puppet_Integration_managing-configurations-puppet 

Unless the BZ in question is being addressed, This should be marked as known issue.

Or, we should add a note in point 2 of "1.7. Disabling Puppet Integration with Satellite" that, Users cannot enable back puppet plugin if they use the --remove-all-data option


Reported by: rhn-support-saydas

https://access.redhat.com/documentation/en-us/red_hat_satellite/6.11/html/managing_configurations_using_puppet_integration_in_red_hat_satellite/introducing-configuration-management-using-puppet_managing-configurations-puppet#annotations:db6e529a-c2b2-4a68-882c-1da22205aa5b