Currently when operators need to log onto a machine where an alloc
is running they will need to perform both an alloc/job status
call and then a call to discover the node name from the node list.

This updates both the job status and alloc status output to include
the node name within the information to make operator use easier.

Closes #2359
Cloess #1180

* navigation and initial steps of guide

* generate certs with appropriate token

* configure Nomad to use TLS

* add cli keys and certs

* add server gossip encryption section

* fix mislabeled steps

* vault paths formatting

* remove bit about cert revocation

* add clarification in challenge that we will be securing an existing Nomad cluster

* add some comments to consul-template.hcl to help user walk through it

* clarifying comments for CLI certs templates

* reorganize steps, change permissions on certs, and sub pkill command with systemctl reload nomad

* correct step reference

* add rpc upgrade mode instructions

* correct typo

Remove beta tags from 0.9 docs

scripts for upgrade testing

drivers/docker: fix image name handleing when prefixed with https://