Revert "zodbpickle: v↑ (1.0.4 -> 2.0.0)"

This reverts commit 1c2d1c0a.
because NEO is not ready for such change.

software/neoppod/software-common.cfg

@@ -151,7 +151,7 @@ pycurl = 7.43.0
 setproctitle = 1.1.10
 slapos.recipe.template = 4.4
 transaction = 1.7.0
-zodbpickle = 2.0.0
+zodbpickle = 1.0.4
 zodbtools = 0.0.0.dev4
 cython-zstd = 0.2
 python-dateutil = 2.7.3