Cleanup fixtures

Author: TheMeier

.fixtures.yml

@@ -1,6 +1,6 @@
+---
 fixtures:
   repositories:
-    stdlib: https://github.com/puppetlabs/puppetlabs-stdlib.git
     epel: https://github.com/voxpupuli/puppet-epel.git
-    yumrepo_core:
-      repo: https://github.com/puppetlabs/puppetlabs-yumrepo_core.git
+    stdlib: https://github.com/puppetlabs/puppetlabs-stdlib.git
+    yumrepo_core: https://github.com/puppetlabs/puppetlabs-yumrepo_core.git