Enhancement: Add support for splunk.secret to be passed as a variable

[chrisbalmer]

I'd like to be able to pass the splunk.secret as a variable instead of a file so it can be pulled from a secret storage (i.e. HashiCorp Vault, 1Password, etc).

[shparker1977]

You can also do this with the builtin ansible copy module:

- name: Push the secrets file
  tags: install
  copy:
    content: '{{ splunk_secret' }}'
    dest: '{{ splunk_home }}/etc/auth/splunk.secret'
  notify:
    - restart splunk

[peterchenadded]

Other code needs to be updated, otherwise all pass4symmkey and sslPasswords won't be able to decrypt and your server probably won't start.