slapos-testing: Use lab instead git.erp5.org

  There is no strong reason to use git.erp5.org to test code anymore

software/slapos-testing/software.cfg

@@ -45,7 +45,7 @@ branch = master
 
 [slapos.cookbook-repository]
 <= git-clone-repository
-repository = http://git.erp5.org/repos/slapos.git
+repository = https://lab.nexedi.com/nexedi/slapos.git
 
 [slapos.core-repository]
 <= git-clone-repository
@@ -65,7 +65,7 @@ repository = https://lab.nexedi.com/nexedi/slapos.recipe.cmmi.git
 
 [erp5-util-repository]
 <= git-clone-repository
-repository = http://git.erp5.org/repos/erp5.git
+repository = https://lab.nexedi.com/nexedi/erp5.git
 
 [template]
 recipe = slapos.recipe.template