Changed prodinf01n01 to testing environment

* this environment doesnt exist, so should allow me to overwrite which
    environemnt is set in the enc.
    e.g. puppet agent -t -E test_branch_abc

data/prodinf01n01.main.unkin.net.yaml

@@ -1,4 +1,4 @@
 ---
 classes:
   - role::puppet::puppetmaster
-environment: develop
+environment: testing