Required options should be required

Fail the catalog if they are not provided

Change-Id: I7927d78491638d831d33581080f3a76dfdb9fba4

manifests/gem.pp

@@ -16,8 +16,8 @@
 #
 # A class to manage rubygems proxy settings
 class setproxy::gem (
-  $http_proxy   = undef,
-  $https_proxy  = undef,
+  $http_proxy,
+  $https_proxy,
 ) {
 
   file { '/etc/gemrc':

manifests/git.pp

@@ -35,6 +35,8 @@ class setproxy::git (
   }
 
   if $enable_gitproxy {
+    validate_string($http_proxy)
+    validate_string($https_proxy)
     file { '/usr/local/bin/gitproxy':
       ensure  => file,
       content => template('setproxy/gitproxy.erb'),