Fix UnicodeDecodeError in remote logging test

Change-Id: I8936cd3e01be44a1c324495ac972a2ba0196521f
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/extended/test_remote_logging.robot b/redfish/extended/test_remote_logging.robot
index 758a0a9..5c90401 100644
--- a/redfish/extended/test_remote_logging.robot
+++ b/redfish/extended/test_remote_logging.robot
@@ -293,7 +293,7 @@
     Run Keyword And Ignore Error  Redfish Power On
     ${bmc_journald}=  Stop Journal Log
 
-    ${cmd}=  Catenate  SEPARATOR=  egrep '${bmc_hostname}' /var/log/syslog
+    ${cmd}=  Catenate  SEPARATOR=  egrep -a '${bmc_hostname}' /var/log/syslog
     ${remote_journald}=  Remote Logging Server Execute Command  command=${cmd}
 
     @{lines}=  Split To Lines  ${bmc_journald}