Use default Sensu redact

Use default Sensu redact

By default sensu-puppet is overring default list of varibles which should
be redacted. This patch enables to configure redact list and uses default
value given by [1]. This patch also serves as a workaround until [2]
is merged in the module itself (or in case it won't get merged).

[1] https://sensuapp.org/docs/0.24/reference/clients.html
[2] https://github.com/sensu/sensu-puppet/pull/580

Closes-Bug: #1641080
Closes-Bug: rhbz#1392473
Change-Id: I21201f734d2fbf5f571091603126cf11cfdd8c40