Fixing a typo in the MeterState enum.

Change-Id: Ie81c3a88c0820463af55b4bde1dc014032c7e92d
diff --git a/core/api/src/main/java/org/onosproject/net/meter/MeterState.java b/core/api/src/main/java/org/onosproject/net/meter/MeterState.java
index 94b41a6..400ad0c 100644
--- a/core/api/src/main/java/org/onosproject/net/meter/MeterState.java
+++ b/core/api/src/main/java/org/onosproject/net/meter/MeterState.java
@@ -26,7 +26,7 @@
     PENDING_ADD,
 
     /**
-     * THe meter has been added.
+     * The meter has been added.
      */
     ADDED,