Update module metadata

hiera.yaml

@@ -5,6 +5,6 @@ defaults:  # Used for any hierarchy level that omits these keys.
   datadir: data         # This path is relative to hiera.yaml's directory.
   data_hash: yaml_data  # Use the built-in YAML backend.
 
-hierarchy:
+default_hierarchy:
   - name: 'common'
     path: 'common.yaml'

metadata.json

@@ -6,19 +6,20 @@
   "license": "Apache-2.0",
   "source": "",
   "dependencies": [
-
   ],
   "operatingsystem_support": [
     {
       "operatingsystem": "Debian",
       "operatingsystemrelease": [
-        "8"
+        "8",
+        "9"
       ]
     },
     {
       "operatingsystem": "Ubuntu",
       "operatingsystemrelease": [
-        "16.04"
+        "16.04",
+        "18.04"
       ]
     }
   ],
@@ -31,4 +32,4 @@
   "pdk-version": "1.9.0",
   "template-url": "file://C:/Program Files/Puppet Labs/DevelopmentKit/share/cache/pdk-templates.git",
   "template-ref": "1.9.0-0-g7281db5"
-}
+}