stack/erp5-zope2: Adapt to buildout3

Use official SOAPpy=0.12.22 compatible with pip.
Downgrade zope.authentication=4.5.0 because 5.0 requires Python>=3.7.

Apply 8c45efb1 in stack/erp5-zope2

stack/erp5-zope2/buildout.cfg

@@ -524,8 +524,17 @@ Products.DCWorkflow-patch-options = -p1
 [Products.GenericSetup]
 <= zope-product-with-eggtestinfo
 
+[wstools]
+# a SOAPpy dependency
+recipe = zc.recipe.egg:custom
+egg = wstools
+setup-eggs =
+  pbr
+  pytest-runner
+
 [eggs]
 <= neoppod
+depends = ${wstools:recipe}
 eggs = ${neoppod:eggs}
   ${caucase-eggs:eggs}
   ${wendelin.core:egg}
@@ -741,9 +750,6 @@ PasteDeploy = 1.5.2
 argparse = 1.4.0
 zope.dottedname = 4.1.0
 
-# modified version that works fine for buildout installation
-SOAPpy = 0.12.0nxd001
-
 # CMF 2.3 is not yet supported.
 Products.CMFCalendar = 2.2.3
 Products.CMFCore = 2.2.10
@@ -818,6 +824,8 @@ dask = 0.18.1
 toolz = 0.9.0
 zope.globalrequest = 1.5
 waitress = 1.4.4
+SOAPpy = 0.12.22
+wstools = 0.4.8
 
 Products.ZSQLMethods = 2.13.5
 fpconst = 0.7.2
@@ -868,6 +876,7 @@ persistent= 4.6.4
 zodbpickle= 2.0.0
 
 # Override configuration specified in component/neoppod
+zope.authentication = 4.5.0
 zope.event= 3.5.2
 zope.exceptions = 3.6.2
 zope.testing = 3.9.7