`contain` statements with absolute class names (that is, with leading
::) are not supported in Puppet 3.6.x. Also quoted classes do not work
properly.
Change-Id: Ie565e432f7de14eaf6bb2a78f1bba2f1f4e30302
(cherry picked from commit b23ca827e5a36187dcf39eec0b8997dddeae5462)