Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1650127

Description of problem:
Custome Boolean Puppet facts with value False are not on the WebUI, Hammer output or with REST API. Only facts with value True are shown/stored.

Version-Release number of selected component (if applicable):
Satellite 6.4
Puppet 5

How reproducible:
Always

Steps to Reproduce:
In /opt/puppetlabs/puppet/cache/lib/facter

1. cat temp.rb
   require 'facter'

Facter.add("always_true") do
confine :kernel => "Linux"
setcode do
true
end
end

Facter.add("always_false") do
confine :kernel => "Linux"
setcode do
false
end
end

Actual results:
- False value is not displayed

1. hammer fact list --search "name=always_true"
   ----------------------|-------------|------
   HOST | FACT | VALUE
   ----------------------|-------------|------
   lvmpig03 | always_true | true
   ----------------------|-------------|------

Expected results:
- False value should be displayed

1. hammer fact list --search "name=always_false"
   ----------------------|-------------|------
   HOST | FACT | VALUE
   ----------------------|-------------|------
   lvmpig03 | always_false | false
   lvmpig03 | always_true | true
   ----------------------|-------------|------