Increase redfish image upload timed out

Network and image file size could result in image upload failure.
The changes is made to improve chance of upload success rate.

Change-Id: I84020b9bab6973e2aa2bf4442e48f4d0b5175e90
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/code_update_utils.robot b/lib/code_update_utils.robot
index 150e8bf..15f52be 100644
--- a/lib/code_update_utils.robot
+++ b/lib/code_update_utils.robot
@@ -172,7 +172,7 @@
 
     ${image_data}=  OperatingSystem.Get Binary File  ${image_file_path}
 
-    Wait Until Keyword Succeeds  3 times  60 sec
+    Wait Until Keyword Succeeds  2 times  180 sec
     ...  Upload Image To BMC  ${uri}  data=${image_data}