kvm, linodes: make longview API key Sensitive

Author: kenyon

data/virtualization/kvm.yaml

@@ -1,6 +1,10 @@
 ---
 # Config data for virtual machines running under KVM, including Linodes.
 
+lookup_options:
+  profile::vms::kvm::linode::longview_api_key:
+    convert_to: Sensitive
+
 classes:
   - profile::vms::kvm
 

local-modules/profile/manifests/vms/kvm/linode.pp

@@ -5,7 +5,7 @@
 #   Longview API key.
 #
 class profile::vms::kvm::linode (
-  String[1] $longview_api_key,
+  Sensitive[String[1]] $longview_api_key,
 ) {
   apt::source { 'linode-longview':
     location     => 'https://apt-longview.linode.com/',
@@ -29,7 +29,7 @@
     group   => root,
     mode    => '0400',
     content => @("EOT"),
-      ${longview_api_key}
+      ${longview_api_key.unwrap}
       | EOT
   }
   -> service { 'longview':