garbage collect

Signed-off-by: Kris Hicks <krishicks@gmail.com>
Merge remote-tracking branch 'origin/develop' into develop
bump diego-smoke-tests

Submodule src/github.com/cloudfoundry-incubator/diego-smoke-tests 6a4efe2..444d691:
  > run cf logs --recent before deleting

Signed-off-by: Atul Kshirsagar <atul.kshirsagar@gmail.com>
upgrade to Go 1.4

[finishes #84395302]

Signed-off-by: Atul Kshirsagar <atul.kshirsagar@gmail.com>
bump executor

[delivers #83783402]

Submodule src/github.com/cloudfoundry-incubator/executor fbe02f3..b26d9eb:
  > Simplify uploader

Signed-off-by: Kris Hicks <krishicks@gmail.com>
bump nsync

Submodule src/github.com/cloudfoundry-incubator/nsync 5d55e58..8829357:
  > fall back on port check if none specified
  > only set up the port spy for 'port' health checks

Signed-off-by: Kris Hicks <krishicks@gmail.com>
Added missing steps in Running Unit tests
Merge branch 'develop' of github.com:cloudfoundry-incubator/diego-release into develop
Create final release 0.683 for build 437