Add task for removing the graphite-nozzle app and security group
Add task for removing the graphite-nozzle app and security group

As we are removing Graphite and Grafana we need to clean up.

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf