erp5/zope4: Zope4 uses ZODB5 so switch to that version by default.

component/ZODB/buildout.cfg

@@ -15,10 +15,10 @@ parts = ZODB/scripts
 #   [ZODB]
 #   major = <ZODB-version-major>
 #
-# By default ZODB4 is used.
+# By default ZODB5 is used.
 [ZODB]
 recipe = slapos.recipe.build
-major  = 4
+major  = 5
 init =
   # link/depend ZODB -> ZODB<X>
   zodb_x = 'ZODB'+options['major']

stack/erp5/buildout.cfg

@@ -59,7 +59,7 @@ extends =
   ../../component/wendelin.core/buildout.cfg
   ../../component/jupyter-py2/buildout.cfg
   ../../stack/caucase/buildout.cfg
-  ../../software/neoppod/software-zodb5.cfg
+  ../../software/neoppod/software-common.cfg
 # keep neoppod extends last