Fix for depreciated Return From Keyword If keyword

Changes:
 - Return From Keyword If  is deprecated since
   Robot Framework version 5.*, use IF and RETURN  instead

Tested:
 - Checked using robot dry-run to make sure the
   syntax is not broken

Change-Id: I458528b33a1abe9fc750a6941e98490db9b36094
Signed-off-by: Sridevi Ramesh <sridevra@in.ibm.com>
diff --git a/redfish/systems/LogServices/test_post_codes.robot b/redfish/systems/LogServices/test_post_codes.robot
index 2f4972a..0e0bcad 100644
--- a/redfish/systems/LogServices/test_post_codes.robot
+++ b/redfish/systems/LogServices/test_post_codes.robot
@@ -203,7 +203,7 @@
     ${last_id}=  Split String  ${last_id}  -
     ${boot_count}=  Set Variable  ${last_id[0][1]}
 
-    Return From Keyword  ${boot_count}
+    RETURN  ${boot_count}
 
 
 Populate PostCode Logs Incase No Prior Entries Available