Various fixes for P4Runtime group handling

- Workaround for PI bug that ignores max_group_size
- Use max_group_size and not buckets size when translating groups

Change-Id: Id12a12311b20ca8fb4e785e1c5a4f0f4215d1bbf
diff --git a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiEntity.java b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiEntity.java
index 531a6a2..1d1e7e0 100644
--- a/core/api/src/main/java/org/onosproject/net/pi/runtime/PiEntity.java
+++ b/core/api/src/main/java/org/onosproject/net/pi/runtime/PiEntity.java
@@ -20,8 +20,7 @@
 import org.onosproject.net.DeviceId;
 
 /**
- * Abstraction of an entity of a protocol-independent that can be read or write
- * at runtime.
+ * Abstraction of a runtime entity of a protocol-independent pipeline.
  */
 @Beta
 public interface PiEntity {