CompilerError used to be defined in Products.PageTemplates.TALES in

Zope 2.8, so try to import it first and fallback on zope.tales.tales
for Zope 2.12.

This fixes failures of testDynamicClassGeneration on Zope 2.8.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43957 20353a03-c40f-0410-a6d1-a30d3c3de9de