apt: Fix apt::ppa for newer Ubuntus

apt/manifests/init.pp

@@ -20,8 +20,14 @@ class apt {
 #
 class apt::ppa::helper {
 
-    package { "python-software-properties":
-        ensure => installed,
+    if $::operatingsystem == "Ubuntu" and versioncmp($::operatingsystemrelease, "12.04") < 0 {
+        package { "python-software-properties":
+            ensure => installed,
+        }
+    } else {
+        package { "software-properties-common":
+            ensure => installed,
+        }
     }
 
 }
@@ -41,12 +47,13 @@ class apt::ppa::helper {
 #
 # apt::ppa { "ppa:igraph/ppa": }
 #
-define apt::ppa($ensure = "present") {
+define apt::ppa($ensure="present") {
 
     tag("bootstrap")
 
     include apt
-    include apt::ppa::helper
+    require apt::ppa::helper
+
     $fname = regsubst($name, "^ppa:([^/]+)/(.+)", "\\1-\\2-${::lsbdistcodename}.list")
 
     case $ensure {
@@ -55,8 +62,7 @@ define apt::ppa($ensure = "present") {
                 path    => "/bin:/usr/bin:/sbin:/usr/sbin",
                 user    => "root",
                 creates => "/etc/apt/sources.list.d/${fname}",
-                require => Package["python-software-properties"],
-                notify  => Exec["apt-get-update"],
+                notify  => Exec["apt-get update"],
             }
         }
         "absent": {