Cleanup ruby code via rubocop

This commit will add code cleanup as corrected
and alerted by rubocop. It also adds rules to
execute rubocop on Travis.

spec/unit/facter/java_major_version_spec.rb

@@ -1,27 +1,25 @@
-require "spec_helper"
+require 'spec_helper'
 
-describe Facter::Util::Fact do
-  before {
+describe 'java_major_version' do
+  before(:each) do
     Facter.clear
-  }
+  end
 
-  describe "java_major_version" do
-    context 'returns major version when java_version fact present' do
-      before :each do
-        Facter.fact(:java_version).stubs(:value).returns('1.7.0_71')
-      end
-      it do
-        expect(Facter.fact(:java_major_version).value).to eq("7")
-      end
+  context 'returns major version when java_version fact present' do
+    before :each do
+      Facter.fact(:java_version).stubs(:value).returns('1.7.0_71')
     end
+    it do
+      expect(Facter.fact(:java_major_version).value).to eq('7')
+    end
+  end
 
-    context 'returns nil when java not present' do
-      before :each do
-        Facter.fact(:java_version).stubs(:value).returns(nil)
-      end
-      it do
-        expect(Facter.fact(:java_major_version).value).to be_nil
-      end
+  context 'returns nil when java not present' do
+    before :each do
+      Facter.fact(:java_version).stubs(:value).returns(nil)
+    end
+    it do
+      expect(Facter.fact(:java_major_version).value).to be_nil
     end
   end
 end