Automation fix for SNMP Trap

Changes:
    - Modified Error value

Tested:
    - Ran successfully  lib/snmp/redfish_snmp_utils.robot

Change-Id: Ib955534be553e4194354ac2c19e5a836d65fea4e
Signed-off-by: Megha G N <Megha.G.N@ibm.com>
diff --git a/lib/snmp/redfish_snmp_utils.robot b/lib/snmp/redfish_snmp_utils.robot
index 0c7cb52..109a971 100644
--- a/lib/snmp/redfish_snmp_utils.robot
+++ b/lib/snmp/redfish_snmp_utils.robot
@@ -28,6 +28,7 @@
 
 ${SNMP_TRAP_BMC_INTERNAL_FAILURE}  xyz.openbmc_project.Common.Error.InternalFailure
 ${SNMP_TRAP_BMC_CALLOUT_ERROR}  xyz.openbmc_project.Common.Error.Timeout
+...  CALLOUT_INVENTORY_PATH=/xyz/openbmc_project/inventory/system/chassis/motherboard TIMEOUT_IN_MSEC=5
 ${SNMP_TRAP_BMC_INFORMATIONAL_ERROR}  xyz.openbmc_project.Common.Error.TestError2