[ONOS-4849] NETCONF function for FUJITSU OLT #6

- Add alart command for FUJITSU OLT
   volt-notification-alertfilter <netconf:target>
   volt-notification-setalertfilter <netconf:target> <alert-severity>
   volt-notification-subscribe <netconf:target> {disable}
- Update fujitsu-drivers.xml and shell-config.xml in FUJITSU directory
- Apply Yuta's and Andrea's suggestion to startSubscription method and other methods which related to startSubscription method.
  -> Remove startSubscriptionConnection() and createSubscriptionString() method in 4th patch-set.
  -> Modify cosmetic issue related to Static-string.
  -> Update "No replay" to "No reply" in VoltGetPonLinksCommand.java

Change-Id: I2c8d5484ea0ff9f0b1b970fe8b183bec12193c46
diff --git a/drivers/fujitsu/src/main/java/org/onosproject/drivers/fujitsu/cli/VoltGetPonLinksCommand.java b/drivers/fujitsu/src/main/java/org/onosproject/drivers/fujitsu/cli/VoltGetPonLinksCommand.java
index 9129d94..1cb73ca 100644
--- a/drivers/fujitsu/src/main/java/org/onosproject/drivers/fujitsu/cli/VoltGetPonLinksCommand.java
+++ b/drivers/fujitsu/src/main/java/org/onosproject/drivers/fujitsu/cli/VoltGetPonLinksCommand.java
@@ -50,7 +50,7 @@
         if (reply != null) {
             print("%s", reply);
         } else {
-            print("No replay from %s", deviceId.toString());
+            print("No reply from %s", deviceId.toString());
         }
     }