Modify the check to handle redis retrieval failures

scripts/fast-reboot

@@ -281,18 +281,19 @@ function check_mirror_session_acls()
     start_time=${SECONDS}
     elapsed_time=$((${SECONDS} - ${start_time}))
     while [[ ${elapsed_time} -lt 10 ]]; do
-        ACL_ENTRIES=( $(redis-cli -n 1 KEYS "*" | grep SAI_OBJECT_TYPE_ACL_ENTRY) )
-	if [[ $? -ne 0 ]]; then
-	    error "Failed to retrieve from redis"
+	CHECK_ACL_ENTRIES=0
+        ACL_OUTPUT=$(sonic-db-cli ASIC_DB KEYS "*" | grep SAI_OBJECT_TYPE_ACL_ENTRY) || CHECK_ACL_ENTRIES=$?
+	if [[ CHECK_ACL_ENTRIES -ne 0 ]]; then
+	    error "Failed to retrieve SAI_OBJECT_TYPE_ACL_ENTRY from redis"
 	    exit ${EXIT_NO_MIRROR_SESSION_ACLS}
 	fi
-        ACL_COUNT=${#ACL_ENTRIES[@]}
-	if [[ ${ACL_COUNT} -eq 0 ]]; then
-	    error "NO ACL_ENTRY objects found"
+	ACL_ENTRIES=( ${ACL_OUTPUT} )
+	if [[ ${ACL_ENTRIES} -eq 0 ]]; then
+	    error "NO SAI_OBJECT_TYPE_ACL_ENTRY objects found"
 	    exit ${EXIT_NO_MIRROR_SESSION_ACLS}
 	fi
         for ACL_ENTRY in ${ACL_ENTRIES[@]}; do
-            ACL_PRIORITY=$(redis-cli -n 1 HGET ${ACL_ENTRY} SAI_ACL_ENTRY_ATTR_PRIORITY)
+            ACL_PRIORITY=$(sonic-db-cli ASIC_DB HGET ${ACL_ENTRY} SAI_ACL_ENTRY_ATTR_PRIORITY)
             if [[ ${ACL_PRIORITY} -eq 8888 ]]; then
                 ACL_ARP="found"
             fi