Increase timeout for CI runs

spec/acceptance/server_spec.rb

@@ -26,7 +26,7 @@
     # This sleeps because hyperglass can take a long time to start. The service
     # check above returns successfully as the service is running though it has
     # not even bound to a port.
-    describe command('sleep 150; curl http://localhost:8001') do
+    describe command('sleep 180; curl http://localhost:8001') do
       its(:stdout) { is_expected.to match %r{hyperglass} }
     end
   end