Pin puppet-sensu
Pin puppet-sensu

The puppet-sensu module recently merged some data typing changes that
has broken tripleo. This change pins to the commit prior to the data
type changes until tripleo can be updated to pass the proper data type
via hiera.

Change-Id: I69ca7ceed21af8d4f00b4f3536921c96cffaf51a
Related-Bug: #1705481

redhat-openstack/rdoinfo,javierpena/rdoinfo