Add workaround for tilt erb handler issue in erubis escaping spec
Add workaround for tilt erb handler issue in erubis escaping spec

I've seen cases on JRuby where depending on how the specs are run,
the Erubis template handler doesn't end up as the default template
handler even if it is defined.  Work around that by explicitly
registering the Erubis handler.

celsworth/roda,jeremyevans/roda,celsworth/roda,jeremyevans/roda,celsworth/roda,jeremyevans/roda