Won't fill /tmp anymore.

Conflicts:
	component/pcre/buildout.cfg

By don't creating the inituser file if it has already been done once.
(cherry picked from commit 54ea7e4e)

It prevents test node to correctly works, due to incompatible change introduced
in 428e9dad72e79ae8c396f6b50cd0b3f13b0f202d. slapproxy usage is currently
broken.

It seems this hack is no longer needed for the moment.

This reverts commit e5852bed.

Fix setuptools 0.7 problem.

This reverts commit 3b7322f2.

This reverts commit 8e7f9f47.

This reverts commit a1b96b19.