ERP5: Add eggs useful for testing

[mock](https://docs.python.org/3/library/unittest.mock.html) and [responses](https://github.com/getsentry/responses).

/reviewed-on nexedi/slapos!568

software/neoppod/software-common.cfg

@@ -158,10 +158,6 @@ zodburi = 2.3.0
 # ZEO 5 requires transaction >= 2
 ZEO = 4.3.1+SlapOSPatched001
 
-# Required by:
-# zodburi==2.0
-mock = 2.0.0
-
 # Required by:
 # ZEO==4.3.1
 zdaemon = 4.2.0

stack/erp5/buildout.cfg

@@ -473,6 +473,7 @@ eggs = ${neoppod:eggs}
   Jinja2
   jsonschema
   mechanize
+  mock
   objgraph
   paramiko
   ply
@@ -482,6 +483,7 @@ eggs = ${neoppod:eggs}
   python-memcached
   pytz
   requests
+  responses
   threadframe
   timerserver
   urlnorm
@@ -801,3 +803,15 @@ unidiff = 0.5.5
 # deepdiff = 3.3.0
 jsonpickle = 0.9.6
 decorator = 4.3.0
+
+mock = 3.0.4
+
+# Required by:
+# mock = 3.0.4
+funcsigs = 1.0.2
+
+responses = 0.10.6
+
+# Required by:
+# responses = 0.10.6
+cookies = 2.2.1