Marathon-lb 1.2.2

Notable changes:

• Refactored ZDD/bluegreen script
• Added pre-kill hook to ZDD

Full changelog: v1.2.1...v1.2.2

Shortlist:

in ~/dev/marathon-lb
± |master ✗| → git shortlog v1.2.1..HEAD | cat
Brenden Matthews (6):
      Fix regression in ZDD draining timeout. (#186)
      Remove iptables rules before starting HAProxy. (#179)
      Update README.md
      Before retrying when deployment is in progress.
      Add a pre-kill hook to ZDD deploy. (#200)
      Rename bluegreen_deploy -> zdd. (#203)

Hang Yan (1):
      Update README.md (#193)

James Awesome Morelli (4):
      Refactor bluegreen_deploy.py (#182)
      correct bug when scaling app instances (#184)
      correct and add test for `swap_bluegreen_apps` timeout (#187)
      Bugfix - Scale new_app separately from killing old_app (#192)

Lukas Loesche (2):
      Revert "hotfix: unbound variable error (#201)"
      Revert "allow to specify group and marathon value via ENV (#199)"

Lukas Lösche (2):
      allow to specify group and marathon value via ENV (#199)
      hotfix: unbound variable error (#201)