Address issue for deprecated syntax

Change from :FOR to FOR/END to address a new WARNING in
the new robot version.

Sample warning message as mention below.

FOR loop starting on line 26: For loop header
': FOR' is deprecated. Use 'FOR' instead.

Signed-off-by: Sushil Singh <susilsi7@in.ibm.com>
Change-Id: I1720b3c7e6fbbafda3fca6f91edf97c80fdd9f41
diff --git a/extended/code_update/code_update_utils.robot b/extended/code_update/code_update_utils.robot
index 6946d90..3a4df5f 100755
--- a/extended/code_update/code_update_utils.robot
+++ b/extended/code_update/code_update_utils.robot
@@ -79,9 +79,10 @@
     # Description of argument(s):
     # image_file_path  Downloaded BMC tar file image path.
 
-    : FOR  ${index}  IN RANGE  0  4
-    \  ${status}=  Retry SCP  ${image_file_path}
-    \  Exit For Loop If  '${status}' == '${True}'
+    FOR  ${index}  IN RANGE  0  4
+      ${status}=  Retry SCP  ${image_file_path}
+      Exit For Loop If  '${status}' == '${True}'
+    END
 
 
 Retry SCP