Bump src/cloud_controller_ng, src/collector, src/dea_next

Bump cloudfoundry/cloud_controller_ng:
  Chris Adams:
     Update Nokogiri to 1.6.2.1 ( Travis created: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/25204927 )
  Momchil Atanasov:
     Added resource limits to diego.desire.app NATS message. ( Travis started: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/25204525 )
Bump cloudfoundry/collector:
  Chris Adams:
     Update Nokogiri to 1.6.2.1 ( Travis created: https://travis-ci.org/cloudfoundry/collector/builds/25204981 )
Bump cloudfoundry/dea_ng:
  Chris Adams:
     Update Nokogiri to 1.6.2.1 ( Travis created: https://travis-ci.org/cloudfoundry/dea_ng/builds/25204974 )

Signed-off-by: Sabha Parameswaran <sparameswaran@gopivotal.com>