Merge pull request #156 in ZP/z-push from bugfix/ZP-794-use-safeputcontents-to-ensure-atomacy-2 to develop

* commit 'f34003c0':
  ZP-794 Remove now useless call to FixFileOwner.
  ZP-794 Call FixFileOwner in SafePutContents.

(cherry picked from commit f49acb93)