Updating .travis.yml for new tests

* Update bundler to avoid rubygems/bundler#3558
* Also Removing older Gemfile entries that fail travis

.travis.yml

@@ -4,20 +4,20 @@ sudo: false
 language: ruby
 cache: bundler
 script: "bundle exec rake validate lint spec"
+before_install:
+    - gem update --system
+    - gem install bundler
 matrix:
   fast_finish: true
   include:
-  - rvm: 2.3.1
+  - rvm: 2.1.5
     bundler_args: --without system_tests
-    env: PUPPET_GEM_VERSION="~> 4.0"
+    env: PUPPET_GEM_VERSION="~> 3.0"
   - rvm: 2.1.9
     bundler_args: --without system_tests
     env: PUPPET_GEM_VERSION="~> 4.0"
-  - rvm: 2.1.5
+  - rvm: 2.4.1
     bundler_args: --without system_tests
-    env: PUPPET_GEM_VERSION="~> 3.0" FUTURE_PARSER="yes"
-  - rvm: 2.1.5
-    bundler_args: --without system_tests
-    env: PUPPET_GEM_VERSION="~> 3.0"
+    env: PUPPET_GEM_VERSION="~> 5.0"
 notifications:
   email: false

Gemfile

@@ -26,16 +26,11 @@ group :test do
 end
 
 group :development do
-  gem 'travis'
-  gem 'travis-lint'
   gem 'puppet-blacksmith'
-  gem 'guard-rake'
-  gem 'listen', '<= 3.0.6', :require => false
-  gem 'rubocop', '0.41.2' if RUBY_VERSION < '2.0.0'
   gem 'rubocop' if RUBY_VERSION >= '2.0.0'
   gem 'rubocop-rspec', '~> 1.6' if RUBY_VERSION >= '2.3.0'
-  gem 'json_pure', '<= 2.0.1' if RUBY_VERSION < '2.0.0'
   gem 'github_changelog_generator'
+  gem 'activesupport', '< 5'
 end
 
 group :system_tests do