slapos-sr-testing: use slapos.core from git [WIP]

this is not for master, once we release slapos.core let's just update
egg version here.

software/slapos-sr-testing/software.cfg

@@ -2,6 +2,7 @@
 
 extends =
   ../../component/bcrypt/buildout.cfg
+  ../../component/lxml-python/buildout.cfg
   ../../component/curl/buildout.cfg
   ../../component/git/buildout.cfg
   ../../component/pillow/buildout.cfg
@@ -15,8 +16,8 @@ extends =
   ./buildout.hash.cfg
 
 parts =
-  slapos-cookbook
   eggs
+  slapos-cookbook
   template
 
 [setup-develop-egg]
@@ -102,16 +103,22 @@ setup = ${slapos-repository:location}/software/nextcloud/test/
 egg = slapos.test.nextcloud
 setup = ${slapos-repository:location}/software/turnserver/test/
 
+[slapos.core-setup]
+<= setup-develop-egg
+egg = slapos.core
+setup = ${slapos.core-repository:location}
+
 [eggs]
 recipe = zc.recipe.egg
 eggs =
+  ${lxml-python:egg}
+  ${slapos.core-setup:egg}
   ${pillow-python:egg}
   erp5.util
   ${python-pynacl:egg}
   ${python-cryptography:egg}
   ${bcrypt:egg}
   slapos.libnetworkcache
-  slapos.core
   supervisor
   ${slapos.cookbook-setup:egg}
   ${slapos.test.caddy-frontend-setup:egg}
@@ -149,6 +156,10 @@ forbid-download-cache = true
 repository = https://lab.nexedi.com/nexedi/slapos.git
 branch = master
 
+[slapos.core-repository]
+<= git-clone-repository
+repository = https://lab.nexedi.com/nexedi/slapos.core.git
+
 [template]
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/${:filename}
@@ -156,6 +167,9 @@ output = ${buildout:directory}/template.cfg
 mode = 640
 
 [versions]
+# Use latest slapos.core
+slapos.core=
+
 # Various needed versions
 Pillow = 5.3.0
 PyNaCl = 1.3.0