test(inspec): replace serverspec with inspec tests

test/integration/default/controls/command_spec.rb

@@ -0,0 +1,7 @@
+control 'Postgres command' do
+  title 'should match desired lines'
+
+  describe command(%q{su - postgres -c 'psql -qtc "\l+ db2"'}) do
+    its(:stdout) { should match(/db2.*remoteUser.*UTF8.*en_US\.UTF-8.*en_US\.UTF-8.*my_space/) }
+  end
+end