Invalid ID is created when facet contains invalid (id) chars

e.g.
f:facet name="

" seems valid from spec perspective

but in MyFaces this name is reused in the UIPanel facet instance and therefore we throw a expcetion later, if it contains

Mojarra doesnt set a ID to the facet, therefore it doenst occur

currently . is replaced with _
i will enhance this to replace {}
in general a regex would be better here but also slower

see: https://github.com/primefaces/primefaces/issues/7060