Change staging option to enabled

Change-Id: I7a83a0da8628f8f511ac8a3eac79de7d908711f9
Bump dea_next pointer

Jennifer Hickey and Maria Shaldybina (3):
      Merge branch 'master' into staging
      Update vcap-staging
      Use queue for staging subscriptions

Maria Shaldybina & Max Brunsfeld (1):
      Return staging log in staging task callback

Pieter Noordhuis (24):
      Import github.com/howeyc/fsnotify
      Add streaming handler based on fsnotify
      Stop streaming when the file is renamed
      Fix stream handler test teardown function
      Open/close file in test for every write
      Clean up max latency writer
      Copy the directory's contents on crash
      Use otherwise unused variable as loop condition
      Make stop function idempotent
      Add idle timeout to stream handler
      Hook up stream handler in directory server
      Run existing tests via gocheck
      Initialize logger in log.go/log_test.go
      Move helper functions to helper_test.go
      Refactor DeaClient
      Move helper function to helper_test.go
      Don't use hard-coded ports in tests
      Add test for URL passthrough
      Add basic tests for max latency writer
      Fix double stop for max latency writer
      Use closed port in test where DEA is unreachable
      Fix and test forwarding headers from the DEA
      Merge changes
I8e47089c,I463180e0,If7f8a2a0,I17dcd2c6,I0975c1e0,Ida77ba2c,I85c56363,I1f380b41,I7e59a924,I53cdd8a3,I49f48283,I46556c77,Ib6f2a4fb,Ib611a76
      Reinitialize logger from directoryserver.Start''

Change-Id: I83ae42ce65a65090764460b93df900d4156632cb