Update response code for dummy file upload

Changes:
    - Response code replaced with HTTP_BAD_REQUEST.

Change-Id: Id029b521d1d6f2f2deaf083349376f7841e305e7
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/test_lists/witherspoon/skip_test_witherspoon_GA1 b/test_lists/witherspoon/skip_test_witherspoon_GA1
index 2a5c961..8513536 100755
--- a/test_lists/witherspoon/skip_test_witherspoon_GA1
+++ b/test_lists/witherspoon/skip_test_witherspoon_GA1
@@ -41,3 +41,4 @@
 -e SDR_Test
 # NA for GA1 service pack.
 -e Verify_Core_Dump_Size
+-e REST_Upload_Stability_Test