factor out integration-style step testing support
add an integration test that renders a new-style step
Tickle #2934
Fix checkLogfiles to not fail with new style steps
Fix cross-site scripting in status_json by specifying nosniff and app/json content
Merge pull request #1254 from djmitche/bug2934

Test for and fix new-style step assertions triggered by Buildbot code

Fixes ticket:2934
Merge pull request #1258 from wmswms/eight

Bugfix 2943: Fix cross-site scripting in status_json by specifying nosniff and app/js...

Fixes ticket:2943