Uses content-network mirror in place of dotdeb
Sets up dotdeb mirror. Fixes #882; fixes #605; fixes #403; countless others
Updates supervisord to latest. Fixes #880
Fixes issue with CentOS and erlang; Updates to latest rabbitmq due to issues:

/Stage[main]/Rabbitmq/Rabbitmq_plugin[rabbitmq_management]: Provider rabbitmqplugins is not functional on this host

Fixes #866