Update bundler to 1.2.1

- Change the order of arguments in bundle commands to make them work
  with new bundler

stager bump shortlog e39a094..4b33245

David Sabeti (1):
  Clear out tmpdir at start-up

Dr Nic Williams (1):
  Support generic env without -u flags to unset vars

Jennifer Hickey (1):
  Bump vcap-staging

Jennifer Hickey and Matthew Kocher (1):
  Rename common to staging_plugin

Maria Shaldybina (1):
  Bump vcap-staging

Matthew Kocher (1):
  Include hidden files at root level in droplet

Change-Id: Ie0386a1bbc241a5e8d3890568da55c93e2c23af6
Merge "Update bundler to 1.2.1"