LU-4726 ptlrpc: vfs_rename api changed

LU-4726 ptlrpc: vfs_rename api changed

In newer kernels the vfs_rename api changed to take
more arguments. This patch creates a wrapper to let us adapt
to the different versions of vfs_rename in old and new kernels.

Signed-off-by: Bob Glossman <bob.glossman@intel.com>
Change-Id: Ia5dafe64570fc404cd8a037fd442ca12e687ffc1
Reviewed-on: http://review.whamcloud.com/9537
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>