Fix tests
Fix tests

Addressing:

    dynflow/test/test_helper.rb:10:in `block in <top (required)>': uninitialized constant Dynflow::CodeWorkflowExample::PollingService

jlsherrill/dynflow,Dynflow/dynflow,dLobatog/dynflow,ares/dynflow,adamruzicka/dynflow,dLobatog/dynflow,adamruzicka/dynflow,xprazak2/dynflow,daviddavis/dynflow,daviddavis/dynflow,iNecas/dynflow,Dynflow/dynflow,Dynflow/dynflow,daviddavis/dynflow,jlsherrill/dynflow,adamruzicka/dynflow,daviddavis/dynflow,Dynflow/dynflow,dLobatog/dynflow,iNecas/dynflow,dLobatog/dynflow,xprazak2/dynflow,ares/dynflow,ares/dynflow,adamruzicka/dynflow