Added Meter object accounting

Change-Id: I2a3b88ffd1756b738e197943b3e02771f5729e45
diff --git a/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java b/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
index c5d57d5..5112a4a 100644
--- a/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
+++ b/core/api/src/main/java/org/onosproject/net/meter/MeterStore.java
@@ -80,4 +80,11 @@
      * @param reason a failure reason
      */
     void failedMeter(MeterOperation op, MeterFailReason reason);
+
+    /**
+     * Delete this meter immediately.
+     * @param m a meter
+     */
+    void deleteMeterNow(Meter m);
+
 }