The documentation for Actions.getEntryPageTitles and Actions.getExitPageTitles in the Report Metadata API call were reversed.
That sounds about right! The system test is now failing though (because of the change), are you able to fix it? Here is the link: https://travis-ci.org/piwik/piwik/jobs/53392846#L675
I'll take a stab at it! Thanks for the feedback. :)