Update .travis.yml (puppetlabs#398)

.travis.yml

@@ -10,29 +10,17 @@ before_install:
   - gem --version
   - bundle -v
 script:
-  - 'bundle exec rake $CHECK'
-bundler_args: --without system_tests
+  - 'bundle exec rake syntax lint metadata_lint check:symlinks check:git_ignore check:dot_underscore check:test_file rubocop'
+  - 'bundle exec rake parallel_spec'
+bundler_args:
 rvm:
-  - 2.5.1
+  - 2.4.4
 env:
-  global:
-    - BEAKER_PUPPET_COLLECTION=puppet6 PUPPET_GEM_VERSION="~> 6.0"
+  - PUPPET_GEM_VERSION="~> 4.0"
+  - PUPPET_GEM_VERSION="~> 5.0"
+  - PUPPET_GEM_VERSION="~> 6.0"
 matrix:
   fast_finish: true
-  include:
-    -
-      env: CHECK="syntax lint metadata_lint check:symlinks check:git_ignore check:dot_underscore check:test_file rubocop"
-    -
-      env: CHECK=parallel_spec
-    -
-      env: PUPPET_GEM_VERSION="~> 6.0" CHECK=parallel_spec
-      rvm: 2.4.4
-    -
-      env: PUPPET_GEM_VERSION="~> 5.0" CHECK=parallel_spec
-      rvm: 2.4.4
-    -
-      env: PUPPET_GEM_VERSION="~> 4.0" CHECK=parallel_spec
-      rvm: 2.1.9
 branches:
   only:
     - master