bin/runUnitTest: fix ZEO mode by not loading ZEO.ClientStorage too early

This is required by testConflictResolution & testInvalidationBug.

stack/erp5.cfg

@@ -236,7 +236,7 @@ python = python2.6
 eggs = ${eggs:eggs}
 extra-paths = ${eggs:extra-paths}
 entry-points =
-  runUnitTest=Products.ERP5Type.tests.runUnitTest:main
+  runUnitTest=runUnitTest:main
 scripts = runUnitTest
 initialization =
   import glob, imp, os, sys