(maint) Fix cve-2013-4761 acceptance test

The acceptance test was removing the file that would have been executed
by the exploit, and was therefore passing regardless of the state of the
bug. Fixed so that the exploit file creates a separate exploited marker
file, and the test removes and checks only the marker file.
(PUP-3277) Change ticket_7117 env/auth.conf test to use environmentpath

This test has been removed from master, but remains in stable and is
being updated to use environmentpath as part of the general work
preparing acceptance for puppet configurations with environmentpath set
by default.
Merge branch 'issue/stable/pup-3277-fix-acceptance-for-default-directory-env-configuration' into stable

* issue/stable/pup-3277-fix-acceptance-for-default-directory-env-configuration:
  (PUP-3277) Change ticket_7117 env/auth.conf test to use environmentpath
  (maint) Fix cve-2013-4761 acceptance test