Remove unsupported ruby from travis

* Chef Client no longer supports Ruby 1.9.3 or 1.8, so drop both of those.
* Drop the patch version number from MRI versions so we just use the
  latest patch
* Turn off sudo. This allows us to run on the faster container-based
  build cluster

.travis.yml

@@ -1,38 +1,28 @@
-rvm: 1.9.3
-
+rvm: 2.0
 gemfile: Gemfile
 
+sudo: false
 script: bundle exec rake pedant
 
 matrix:
   include:
-    - rvm: 1.8.7
-    - rvm: 1.8.7
-      env: SKIP_PEDANT=true
-      gemfile: gemfiles/no-pedant.gemfile
-    - rvm: jruby-19mode
-    - rvm: jruby-19mode
-      env: SKIP_PEDANT=true
-      gemfile: gemfiles/no-pedant.gemfile
-    - rvm: 2.0.0
-    - rvm: 2.1.1
-    - rvm: 2.1.1
+    - rvm: 2.0
+    - rvm: 2.1
+    - rvm: 2.1
       env: SINGLE_ORG=true
-    - rvm: 2.1.1
+    - rvm: 2.1
       env: CHEF_FS=true
-    - rvm: 2.1.1
+    - rvm: 2.1
       env: FILE_STORE=true
-    - rvm: 2.1.1
+    - rvm: 2.1
       script: bundle exec rake chef_spec
       env: TEST=chef_spec
-    - rvm: 2.1.1
+    - rvm: 2.1
       script: bundle exec rake spec
       env: TEST=rake_spec
 
   allow_failures:
-    - rvm: 1.8.7
-    - rvm: jruby-19mode
-    - rvm: 2.1.1
+    - rvm: 2.1
       gemfile: gemfiles/latest-chef.gemfile
       script: bundle exec rake chef_spec
       enc: TEST=chef_spec_latest