OPS-1593 As an operator, I want sudo_user converted to become user in roles and plays, for compatibility with Ansible 2.x

* add splunk searches via ansible

* Fix jinja syntax, add docs

* Add splunk field extractions via ansible

* Use a boolean rather than a number

The fact that splunk uses "1" and "0" to represent booleans is
orthogonal to booleans in yaml. Switching to true booleans for a better
user experience.

* Additional cleanup around splunk searches interface

* Switch splunk role to using common_vars and overrides

This way, we can support environments where we don't, for example, use
datadog.

* Make splunk playbook actually call splunk role

* Fix all the bugs

* Add splunk email config

* Make realtime alerts work

* Add more documentation around splunk alerts

* Address comments

refactoring common inclusion based on comments

removing motd template from common

Removing sshd template

relocating temlates

relocating templates

Relocating dhclient templates

explicit play depends

Update responsibilities

indent

further dependency updates

additional updates

Common dependency for server utils

Supervisor is required for role integrity

Typos

further template ownership changes