This patch begins the teardown of the RHEL 6 STIG content from the
ansible-hardening repository. It will still be maintained in
Pike and earlier branches.
This patch also updates the ansible-hardening documentation for the
Queens release and notes that Pike is the latest stable version.
Closes-Bug: 1715745
Change-Id: Iaae52c97a35d82dd807ef78a1a6593ce3aa33540
0c0767b3f1