also put INSERT_PRODUCTS_PATH in erp5testrunner's sys.path

Tests directory of inserted paths also needs to be in sys.path so that tests
can import other tests.
Update eggs version
Fix CHANGES rst syntax.
version up : ghostscript 9.07.

* enable thread safe
* build without libidn
version up : poppler 0.22.2.
version up : libcroco 0.6.8, librsvg 2.36.4.

(librsvg 2.37 requires newer pango.)
version up : erp5.util = 0.4.33 and add zodbanalyze.