Polished BMv2 protocol module

- Improved and fixed typos in javadocs
- Added missing beta API annotations
- Refactored the default interpreter implementation

Change-Id: Ibfb21d31415d8f25cc67307f8bea2871951c9a8f
diff --git a/protocols/bmv2/api/src/main/java/org/onosproject/bmv2/api/runtime/Bmv2MatchKey.java b/protocols/bmv2/api/src/main/java/org/onosproject/bmv2/api/runtime/Bmv2MatchKey.java
index c0c6b7c..34276aa 100644
--- a/protocols/bmv2/api/src/main/java/org/onosproject/bmv2/api/runtime/Bmv2MatchKey.java
+++ b/protocols/bmv2/api/src/main/java/org/onosproject/bmv2/api/runtime/Bmv2MatchKey.java
@@ -16,6 +16,7 @@
 
 package org.onosproject.bmv2.api.runtime;
 
+import com.google.common.annotations.Beta;
 import com.google.common.base.MoreObjects;
 import com.google.common.collect.Lists;
 import org.onlab.util.ImmutableByteSequence;
@@ -30,6 +31,7 @@
 /**
  * A match key of a BMv2 match-action table entry.
  */
+@Beta
 public final class Bmv2MatchKey {
 
     private final List<Bmv2MatchParam> matchParams;