Merge r1524869 from trunk:

 * r1524869
   JavaHL: Canonicalize path for streamFileContent method.
   Justification:
      JavaHL is designed around us doing the canonicalization.
   Votes:
     +1: breser, stefan2
     +0: rhuijben


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x@1532178 13f79535-47bb-0310-9956-ffa450edef68