Fixes #6411 - filter content param in CU BZ1111484

The content param in the content_uploads action is causing
the log to fill up with garbage since content is binary.  This
filters the log so that the content_uploads the content param is
filtered.
Merge pull request #4364 from dustint-rh/filter_log_content_using_foreman_katello_plugin

Fixes #6411 - filter params by path BZ1111484