Use concat 1.2.x

Author: Morgan Haskel

.fixtures.yml

@@ -1,7 +1,9 @@
 fixtures:
   repositories:
     stdlib: "git://github.com/puppetlabs/puppetlabs-stdlib.git"
-    concat: "git://github.com/puppetlabs/puppetlabs-concat.git"
+    concat:
+      repo: "git://github.com/puppetlabs/puppetlabs-concat.git"
+      branch: "1.2.x"
     portage: "git://github.com/gentoo/puppet-portage.git"
   symlinks:
     apache: "#{source_dir}"