Removed option --backup=simple from install_project.py

Fixes LBCORE-1083

LbLegacy/python/LbLegacy/install_project.py

@@ -2599,9 +2599,9 @@ def untarFile(fname, output_path=""):
retcode = 1
return retcode
else:
-            strcmd = 'tar --extract --ungzip --touch --backup=simple --file %s' % filename
+            strcmd = 'tar --extract --ungzip --touch --file %s' % filename
if fix_perm :
-                strcmd = 'tar --extract --ungzip --touch --no-same-permissions --backup=simple --file %s' % filename
+                strcmd = 'tar --extract --ungzip --touch --no-same-permissions --file %s' % filename
if output_path :
strcmd += " --directory=%s " % output_path
tar_output = None