Revert "Temporarily disable broken test setup"

This reverts commit bba65fe.

Author: Greg Dubicki

.travis.yml

@@ -97,12 +97,12 @@ matrix:
     env: PUPPET_INSTALL_TYPE=agent BEAKER_IS_PE=no BEAKER_PUPPET_COLLECTION=puppet6-nightly BEAKER_debug=true BEAKER_setfile=debian8-64{hypervisor=docker} CHECK=beaker
     services: docker
     sudo: required
-#  - rvm: 2.5.1
-#    bundler_args: --without development release
-#    dist: trusty
-#    env: PUPPET_INSTALL_TYPE=agent BEAKER_IS_PE=no BEAKER_PUPPET_COLLECTION=puppet5 BEAKER_debug=true BEAKER_setfile=debian9-64{hypervisor=docker} CHECK=beaker
-#    services: docker
-#    sudo: required
+  - rvm: 2.5.1
+    bundler_args: --without development release
+    dist: trusty
+    env: PUPPET_INSTALL_TYPE=agent BEAKER_IS_PE=no BEAKER_PUPPET_COLLECTION=puppet5 BEAKER_debug=true BEAKER_setfile=debian9-64{hypervisor=docker} CHECK=beaker
+    services: docker
+    sudo: required
   - rvm: 2.5.1
     bundler_args: --without development release
     dist: trusty