Bump src/dea_next, src/loggregator

Bump cloudfoundry/dea_ng:
  Maria Shaldibina:
     Fix flaky test: regenerate droplet sha1 in start message on every call ( Travis Success: https://travis-ci.org/cloudfoundry/dea_ng/builds/17020491 )
     Don't emit staging output to loggregator ( Travis Success: https://travis-ci.org/cloudfoundry/dea_ng/builds/17014858 )
     Save warden job id to snapshot after staging task was spawned ( Travis Success: https://travis-ci.org/cloudfoundry/dea_ng/builds/16955319 )
     Snapshot additional attributes for staging task ( Travis Success: https://travis-ci.org/cloudfoundry/dea_ng/builds/16903970 )
     Use spawn/link instead of run_script in staging task ( Travis Unknown )
     Add Container#link_or_raise ( Travis Unknown )
  Ben Hale:
     Update Java Buildpack ( Travis Failed: https://travis-ci.org/cloudfoundry/dea_ng/builds/16905659 )
Bump :
  Kris Kelly:
     Send staging messages with STG source name
     Read staging tasks stdout/stderr output along with instances
     Rename instances->task to generalize container jobs
  Tony Hansmann:
     Merge pull request #9 from GarfieldLinux/master
  Dave L:
     Added info on multiple instances/scaling up
  Chris Wang:
     Allow auth token to be passed as query param (once again)
  GarfieldLinux:
     new license notice file