Vagrant: icinga_packages: include icinga-php-* from release repo

... as they're not snapshotted.

.puppet/modules/icinga_packages/manifests/init.pp

@@ -14,4 +14,13 @@ class icinga_packages {
     gpgkey    => 'https://packages.icinga.com/icinga.key',
     descr     => "Icinga Repository - ${::architecture}"
   }
+
+  yumrepo { 'icinga_release_packages':
+    baseurl     => "https://packages.icinga.com/epel/${::operatingsystemmajrelease}/release/",
+    enabled     => '1',
+    gpgcheck    => '1',
+    gpgkey      => 'https://packages.icinga.com/icinga.key',
+    descr       => "Icinga Repository - ${::architecture} (release)",
+    includepkgs => 'icinga-php-*'
+  }
 }