Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  Derek Richard:
     Update error returned when for invalid syslog service ( Travis created: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/33329425 )
Bump src/acceptance-tests

Bump :
  Luan Santos and Zach Robinson:
     Add tests for environment variable groups.
add metron to traffic controller

[#77046254]

Signed-off-by: Johannes Petzold <jpetzold@pivotal.io>
update syslog forwarder templates to forward all logs, not just vcap

- change format to include job name instead of program name

[#77225176]

Signed-off-by: Johannes Petzold <jpetzold@pivotal.io>
bump loggregator

d143e61 bump loggregator_consumer
e6ddef0 Adding a dropsonde streaming endpoint to the trafficcontroller
7f729dc traffic controller supports authentication via cookie
4ec2957 update syslog forwarder templates to forward all logs, not just vcap
8f40b76 bump loggregator_consumer
3e9f2c3 Bumping dropsonde to support the new Unmarshall method
15f784d go fmt
15bed5c traffic controller publishes runtime metric via dropsonde