Bump src/cloud_controller_ng, src/dea_next

Bump cloudfoundry/cloud_controller_ng:
  Michael Fraenkel:
     Round out tests with multiple columns and DESC sort ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/33493431 )
     Set DelayedWorker name ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/33492238 )
     Allow sort by multiple columns ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/33398666 )
     Revert "Fix flaky spec" ( Travis Unknown )
  James Myers and Luan Santos:
     Fix flaky spec ( Travis Success: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/33336152 )
Bump cloudfoundry/dea_ng:
  Michael Fraenkel:
     Order shouldn't matter ( Travis Success: https://travis-ci.org/cloudfoundry/dea_ng/builds/33496602 )

Signed-off-by: Matthew Sykes <matthew.sykes@gmail.com>
Make cc.generic.number_of_workers overridable

[#76818254]