In windows systems the rename() function fails if the new name
of the original file corresponds to a file that already exists.
The fix removes the new file before renaming the original one.
Jira: ZEP-980
Change-Id: Ib3a43db86c0dd3fabb592f53ea7619eb5738bb65
Signed-off-by: Juan Manuel Cruz <juan.m.cruz.alcaraz@intel.com>