back port fix from JBSEAM-4203-Interpolator swallows all exceptions

org.jboss.seam.core.Interpolator swallows all exceptions, so if I have #

{entityHome.instance.name} somewere in the page, and entityHome has id which is missed from database - I expect that org.jboss.seam.framework.EntityNotFoundException will be handled by this block in pages.xml

<exception class = "org.jboss.seam.framework.EntityNotFoundException">
<redirect view-id = "/error.xhtml">
<message severity = "warn">#{messages['org.jboss.seam.framework.EntityNotFoundException']}</message>
</redirect>
</exception>

but, instead I got
[WARN] exception interpolating string: #{entityHome.instance.name}

This is due
Interpolator.java:131
} catch (Exception e)

{ log.warn("exception interpolating string: " + string, e); }