Avoid status code 409 when adding a VIM in long processing status

Change-Id: Ice52f7d6c002e7c2b83b66bce8e696e2ca5a51ba
Signed-off-by: fjvicens <fjvicens@edgecloudlabs.com>
diff --git a/robot-systest/run_test.sh b/robot-systest/run_test.sh
index a279ff0..f7d4235 100755
--- a/robot-systest/run_test.sh
+++ b/robot-systest/run_test.sh
@@ -47,7 +47,7 @@
             ((i++))
             if [[ $i -eq 5 ]]; then
                 echo "VIM stuck in PROCESSING after 50 seconds"
-                osm vim-delete ${VIM_TARGET}
+                osm vim-delete --force ${VIM_TARGET}
                 sleep 5
                 break
             fi