[mesos] (6 commits) ...Merge branch 'f21'

[tstclair]

Summary of changes:

  ffe83c3... WIP update for complete systemd and sysconfig integration (*)
  c3e3cc4... Temporary work in progress update to track the lastest modi (*)
  2d24786... re-enable arm (*)
  3e7c6db... update to include examples (*)
  9177f13... Merge branch 'f20' into f21 (*)
  a075856... Merge branch 'f21'

(*) This commit already existed in another branch; no separate mail sent