ospf: Reduce MaxAge log level

Reduce the log level for the MaxAge LSA reception when such an LSA does
not exist in the database.

Signed-off-by: Ayan Banerjee <ayan@cumulusnetworks.com>
Reviewed-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Reviewed-by: Nolan Leake <nolan@cumulusnetworks.com>
Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c
index ede5908..d79df53 100644
--- a/ospfd/ospf_packet.c
+++ b/ospfd/ospf_packet.c
@@ -1834,8 +1834,11 @@
 	  ospf_ls_ack_send (nbr, lsa);
 
 	  /* Discard LSA. */	  
-	  zlog_info ("Link State Update[%s]: LS age is equal to MaxAge.",
-		     dump_lsa_key(lsa));
+          if (IS_DEBUG_OSPF (lsa, LSA))
+            {
+	       zlog_debug ("Link State Update[%s]: LS age is equal to MaxAge.",
+                           dump_lsa_key(lsa));
+            }
           DISCARD_LSA (lsa, 3);
 	}