Remove syslog_forwarder.conf.erb from CC jobs

* Remove symlinks to template in cloud_controller_ng submodule
* Remove from CC job specs
* metron_agent job should be co-located with CC jobs to provide syslog
  forwarding configuration now
* CC ctl scripts will generate an error log line complaining about not finding
  their copy of the evaluated template, but they will still function
  correctly
* ctl script error to be resolved by changes in [CC PR #303](https://github.com/cloudfoundry/cloud_controller_ng/pull/303)

[#80253108]
Bump src/cloud_controller_ng

Bump cloudfoundry/cloud_controller_ng:
  James Myers and Zach Robinson:
     Add drain for restarts due to memory usage ( Travis started: https://travis-ci.org/cloudfoundry/cloud_controller_ng/builds/37451802 )