Merge branch '15-unit-tests-with-rspec-puppet-facts' into 'master'

Resolve "unit tests with  rspec-puppet-facts"

Closes #15

See merge request adullact/puppet-freeipa!19

metadata.json

@@ -19,6 +19,12 @@
       "operatingsystemrelease": [
         "7"
       ]
+    },
+    {
+      "operatingsystem": "Ubuntu",
+      "operatingsystemrelease": [
+        "16.04"
+      ]
     }
   ],
   "requirements": [