Updated travisci file to do testing for Puppet 4

Author: jonnytdevops

.travis.yml

@@ -12,8 +12,7 @@ matrix:
     env: PUPPET_GEM_VERSION="~> 3.0"
   - rvm: 2.0.0
     env: PUPPET_GEM_VERSION="~> 3.0"
-  allow_failures:
-    - rvm: 2.1.6
-      env: PUPPET_GEM_VERSION="~> 4.0" STRICT_VARIABLES="yes"
+  - rvm: 2.1.6
+    env: PUPPET_GEM_VERSION="~> 4.0" STRICT_VARIABLES="yes"
 notifications:
   email: false