Merge r1539309 from trunk:

 * r1539309 
   Fix test failure in checkout_tests.py after backporting of r1518184
   to 1.7.x in r1538135.
   Justification:
     The extended regression test relied on test suite behavior in 1.8+,
     by not passing a disk tree. The easy fix is to just pass a disk tree.
   Votes:
     +1: rhuijben, jcorvel, stefan2


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x@1555651 13f79535-47bb-0310-9956-ffa450edef68