Initial import of the role after tidying it up

test/integration/openhab/serverspec/Gemfile

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+source 'https://rubygems.org/'
+gem 'rake'
+gem 'busser'

test/integration/openhab/serverspec/openhab_spec.rb

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+require 'serverspec'
+
+# Required by serverspec
+set :backend, :exec
+
+describe package('openhab') do
+    it { should be_disabled }
+end
+
+describe service('openhab') do
+    it { should be_enabled }
+    it { should be_running }
+end
+
+describe port(80) do
+    it { should be_listening }
+end
+describe port(443) do
+    it { should be_listening }
+end