Split haveged into its own class

We need it on KDC hosts too, so let's split it out so we can consume
it there.

Change-Id: Ib913694cc0fb9d09b1560acfde0b771192da3fdc

manifests/init.pp

@@ -0,0 +1,13 @@
+# Install and run haveged to provide entropy
+class haveged {
+
+  package { 'haveged':
+    ensure => present,
+  }
+
+  service { 'haveged':
+    enable  => true,
+    require => Package[haveged],
+  }
+
+}