check for wfe port liveness in integration tests
check for wfe port liveness in integration tests

We're getting many more spurious "Can't connect to WFE" errors in
TravisCI. So, we add the WFE's main port to the port liveness check in
amqp-integration-test.py.

Fixes #1099

sophie-h/boulder,ibukanov/boulder,patf/boulder,ZCloud-Firstserver/boulder,mozmark/boulder,jfrazelle/boulder,jfrazelle/boulder,patf/boulder,mehmooda/boulder,mehmooda/boulder,jsha/boulder,mehmooda/boulder,patf/boulder,letsencrypt/boulder,patf/boulder,benileo/boulder,mozmark/boulder,ZCloud-Firstserver/boulder,bmw/boulder,benileo/boulder,ZCloud-Firstserver/boulder,ibukanov/boulder,hlandauf/boulder,benileo/boulder,r0ro/boulder,r0ro/boulder,bmw/boulder,ibukanov/boulder,sophie-h/boulder,ZCloud-Firstserver/boulder,jfrazelle/boulder,hlandauf/boulder,jcjones/boulder,mehmooda/boulder,jcjones/boulder,jfrazelle/boulder,lucasallan/boulder,bmw/boulder,jsha/boulder,jcjones/boulder,letsencrypt/boulder,benileo/boulder,mozmark/boulder,hlandauf/boulder,letsencrypt/boulder,jcjones/boulder,sophie-h/boulder,jsha/boulder,r0ro/boulder,lucasallan/boulder,lucasallan/boulder,r0ro/boulder,hlandauf/boulder,mozmark/boulder