Removed OpenJDK from TravisCI config.

Author: jdantonio

.travis.yml

@@ -1,36 +1,26 @@
 language: ruby
+
 rvm:
   - 2.2.0
   - 2.1.5
+  - 2.1.4
   - 2.0.0
   - 1.9.3
   - ruby-head
   - jruby-1.7.19
   - jruby-head
   - rbx-2
-jdk: # for JRuby only
-  - openjdk7
+
+jdk:
   - oraclejdk8
+
+sudo: false
+
+branches:
+  only:
+    - master
+
 matrix:
-  exclude:
-    - rvm: 2.2.0
-      jdk: openjdk7
-      jdk: oraclejdk8
-    - rvm: 2.1.5
-      jdk: openjdk7
-      jdk: oraclejdk8
-    - rvm: 2.0.0
-      jdk: openjdk7
-      jdk: oraclejdk8
-    - rvm: 1.9.3
-      jdk: openjdk7
-      jdk: oraclejdk8
-    - rvm: ruby-head
-      jdk: openjdk7
-      jdk: oraclejdk8
-    - rvm: rbx-2
-      jdk: openjdk7
-      jdk: oraclejdk8
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head