BMC IPv6 Utils Library robot code with latest directives

    Changes:
       - Run KeyWord If is deprecated since Robot
         Framework version 5.*, use 'IF' instead

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

Change-Id: I0bba84f07b77472f43b6dab5dada2b43362a3429
Signed-off-by: Murali Devarapu <devarapu.murali@ibm.com>
diff --git a/lib/bmc_ipv6_utils.robot b/lib/bmc_ipv6_utils.robot
index be26b4b..8e27824 100644
--- a/lib/bmc_ipv6_utils.robot
+++ b/lib/bmc_ipv6_utils.robot
@@ -64,11 +64,11 @@
 
     # If gateway IP is empty it will not have route entry.
 
-    Run Keyword If  '${gateway_ip}' == '0:0:0:0:0:0:0:0'
-    ...      Pass Execution  Gateway IP is not configured.
-    ...  ELSE
-    ...      Should Contain  ${route_info}  ${gateway_ip}
-    ...      msg=Gateway IP address not matching
+    IF  '${gateway_ip}' == '0:0:0:0:0:0:0:0'
+        Pass Execution  Gateway IP is not configured.
+    ELSE
+        Should Contain  ${route_info}  ${gateway_ip}  msg=Gateway IP address not matching.
+    END
 
 
 Get BMC IPv6 Route Info