Bug 561152 - Make move operation more robust

For staging files into the storage area use Files.move to try atomic
moves.  Fall back to non-atomic on failure.  Also use replace option in
case the target exists.

Change-Id: Icd645470b25979dc76a7a1d9ea12b3e4837d634d
Signed-off-by: Thomas Watson <tjwatson@us.ibm.com>
6 files changed