slapos-testing: compile python-cryptography from the custom sections.

software/slapos-testing/software.cfg

@@ -27,6 +27,7 @@ parts =
 recipe = zc.recipe.egg
 eggs =
   ${lxml-python:egg}
+  ${python-cryptography:egg}
   Jinja2
   erp5.util
   slapos.cookbook
@@ -70,7 +71,6 @@ repository = https://lab.nexedi.com/nexedi/slapos.recipe.cmmi.git
 <= git-clone-repository
 repository = https://lab.nexedi.com/nexedi/slapos.toolbox.git
 
-
 [erp5-util-repository]
 <= git-clone-repository
 repository = https://lab.nexedi.com/nexedi/erp5.git