[SDFAB-352][SDFAB-353] Retrieve MeterFeatures from the P4RT southbound, Extend MeterProviderService and revisit MeterStore

Change-Id: I083df67ae5cf0513d82d0ccf00c790d2bb000ef4
diff --git a/core/api/src/main/java/org/onosproject/net/meter/MeterFeaturesKey.java b/core/api/src/main/java/org/onosproject/net/meter/MeterFeaturesKey.java
index fa19a5f..2b5eb07 100644
--- a/core/api/src/main/java/org/onosproject/net/meter/MeterFeaturesKey.java
+++ b/core/api/src/main/java/org/onosproject/net/meter/MeterFeaturesKey.java
@@ -23,7 +23,9 @@
  * A meter features key represents a meter features uniquely.
  * Right now only deviceId is used but this class might be useful in
  * virtualization in which a unique deviceId could have multiple features (guess).
+ * @deprecated in onos-2.5 replaced by {@link MeterTableKey}
  */
+@Deprecated
 public final class MeterFeaturesKey {
     private final DeviceId deviceId;