Add tests for new feature

test/integration/package/package.yaml

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+---
+- host: test-kitchen

test/integration/package/serverspec/default_spec.rb

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+require 'spec_helper'
+
+context "basic tests" do
+
+  describe user('elasticsearch') do
+    it { should exist }
+  end
+
+  describe service('elasticsearch') do
+    it { should be_running }
+  end
+
+  describe package('elasticsearch') do
+    it { should be_installed }
+  end
+
+  describe file('/etc/elasticsearch/elasticsearch.yml') do
+    it { should be_file }
+  end
+
+end
+

test/integration/package/serverspec/spec_helper.rb

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+require 'serverspec'
+set :backend, :exec