Add os-conf to deployment for wings workers to add another user

[pivotal-saman-alvi]

What challenge are you facing?

When trying to fix the wings deployment issue, ran into a case where we could not ssh onto the worker successfully, because of issues with the public_key available in creds. It would be useful to have another user we can use in case we are blocked on being able to login with vcap.

What would make this better?

https://github.com/cloudfoundry/os-conf-release/blob/master/jobs/user_add/spec

[pivotal-saman-alvi]

$ bosh -e prod -d concourse-wings ssh worker/id --opts=-v

Using deployment 'concourse-wings'

Task 1240341. Done
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /Users/NinjaDoppleganger/.ssh/config
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: Executing proxy command: exec ssh -tt -W 10.1.0.11:22 -l bosh-ssh 104.198.208.171 -o ServerAliveInterval=30 -o ForwardAgent=no -o ClearAllForwardings=yes -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null
debug1: permanently_drop_suid: 501
debug1: identity file /Users/NinjaDoppleganger/.bosh/tmp/ssh-priv-key533479921 type -1
debug1: identity file /Users/NinjaDoppleganger/.bosh/tmp/ssh-priv-key533479921-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
Warning: Permanently added '104.198.208.171' (RSA) to the list of known hosts.
Unauthorized use is strictly prohibited. All access and activity
is subject to logging and monitoring.
Permission denied (publickey).
ssh_exchange_identification: Connection closed by remote host

Running SSH:
  1 error(s) occurred:

* Running command: 'ssh -tt -o ServerAliveInterval=30 -o ForwardAgent=no -o PasswordAuthentication=no -o IdentitiesOnly=yes -o IdentityFile=/Users/NinjaDoppleganger/.bosh/tmp/ssh-priv-key533479921 -o StrictHostKeyChecking=yes -o UserKnownHostsFile=/Users/NinjaDoppleganger/.bosh/tmp/ssh-known-hosts104525980 -o ProxyCommand=ssh -tt -W %!h(MISSING):%!p(MISSING) -l bosh-ssh 104.198.208.171 -o ServerAliveInterval=30 -o ForwardAgent=no -o ClearAllForwardings=yes -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -v 10.1.0.11 -l bosh_255ae724516148b6', stdout: '', stderr: '': exit status 255

Exit code 1