Ticket 48982 - When plugin doesn't enable, actually log the path it used
Bug Description: When trying to debug plugin enabling, actually return the
path we tried to enable.
Fix Description: Add path to the error result. Because this is only possible to
cn=Directory Manager it's not a risk.
https://fedorahosted.org/389/ticket/48982
Author: wibrown
Review by: One line, trivial fix