bindep is a helpful tox target to assist in determining
what components a test environment needs to have installed.
For stx-puppet, puppet-lint needs ruby headers otherwise
the tox linters target will fail.
Partial-Bug: #1907678
Signed-off-by: albailey <Al.Bailey@windriver.com>
Change-Id: Iaccd8d8f3af292ef29028cde59f0d344b94f1d72