Pin ERP5 revision and slapos.cookbook

Remove slapos.recipe.build from stack/erp5/buildout.cfg because is already defined in stack/slapos.cfg

stack/erp5/buildout.cfg

@@ -58,7 +58,6 @@ extends =
 
 parts =
   erp5-util-develop
-  slapos-cookbook-develop
   slapos-cookbook
   rdiff-backup
   aspell
@@ -317,7 +316,8 @@ repository_id_list = erp5
 [erp5]
 recipe = slapos.recipe.build:gitclone
 repository = http://git.erp5.org/repos/erp5.git
-branch = master
+branch =
+revision = 08d22b65daad02460c0834e395223935a0ec161f
 git-executable = ${git:location}/bin/git
 
 [testrunner]
@@ -559,8 +559,8 @@ pysvn = 1.7.4nxd006
 # we are still using this old stable version.
 rdiff-backup = 1.0.5
 
-# use newest version of slapos.cookbook
-slapos.cookbook =
+# use newest version of slapos.cookbook at time of release
+slapos.cookbook = 0.89
 
 # modified version that works fine for buildout installation
 SOAPpy = 0.12.0nxd001