Bump src/dea_next:

Elisabeth (1):
      Increase memory capacity in example config file

Kowshik Prakasam and Maria Shaldibina (1):
      Stop staging tasks during shutdown sequence.

Kowshik Prakasam, Maria Shaldibina and Tony Hansmann (1):
      Stop staging tasks + integration specs

Maria Shaldibina and Tim Labeeuw (5):
      Only start dea before all tests
      Raised the tolerance of a timing spec
      Put staging timeout back
      Fix timeout for dea start in specs
      Removed all warden tests from travis. Small cleanups

Mark Rushakoff and Tim Labeeuw (1):
      Bump java buildpack submodule [#46842625]