Use KVM 0.15, checkout from official git repo

stack/kvm.cfg

@@ -106,12 +106,9 @@ environment =
 recipe=plone.recipe.command
 location = ${buildout:parts-directory}/${:_buildout_section_name_}
 stop-on-error = true
-#tag = slapos-v0.1
-branch = upstream
-# Use commit which represents 0.15 tag in upstream repository
-commit = ea2798c1ebe0c12d5feb7d7471a999ea0671ef2f
+tag = qemu-kvm-0.15.0
 command =
-  (${git:location}/bin/git clone -b ${:branch} --quiet http://git.erp5.org/repos/slapos.kvm.git ${:location} && cd ${:location} && ${git:location}/bin/git reset --hard ${:commit}) || (rm -fr ${:location} ; exit 1)
+  (${git:location}/bin/git clone --quiet git://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git ${:location} && cd ${:location} && ${git:location}/bin/git checkout ${:tag}) || (rm -fr ${:location} ; exit 1)
 update-command =
  cd ${:location} && ${git:location}/bin/git pull --quiet origin master