Export/import of local utilities considered harmful

[tseaver]

In https://bugs.launchpad.net/zope-cmf/+bug/281216, @cjw296 reported:

For background see: http://dev.plone.org/plone/ticket/8579

Summary of the problem: You cannot re-constitute local utilities just from a dotted name:

• the constructor may take parameters. Indeeed, imnsho, this is how utilities that require configuration should be configured.
• the utilities may be changed after registration, as is the case with PortletType utilities.

This is with Plone 3.1.1 and associated CMF and Zope versions.