Parse action profile max group size from P4Info annotations

This is a temporary workaround to the inability of p4c to
correctly interpret P4Runtime-defined @max_group_size annotations.

Change-Id: If2799786c135b2eb5b6a3b4c6d6022350d37237e
diff --git a/protocols/p4runtime/model/src/test/java/org/onosproject/p4runtime/model/P4InfoParserTest.java b/protocols/p4runtime/model/src/test/java/org/onosproject/p4runtime/model/P4InfoParserTest.java
index 9d696e2..c05a84c 100644
--- a/protocols/p4runtime/model/src/test/java/org/onosproject/p4runtime/model/P4InfoParserTest.java
+++ b/protocols/p4runtime/model/src/test/java/org/onosproject/p4runtime/model/P4InfoParserTest.java
@@ -70,7 +70,7 @@
 
     private static final Long DEFAULT_MAX_TABLE_SIZE = 1024L;
     private static final Long DEFAULT_MAX_ACTION_PROFILE_SIZE = 64L;
-    private static final int DEFAULT_MAX_GROUP_SIZE = 0;
+    private static final int DEFAULT_MAX_GROUP_SIZE = 16;
 
     /**
      * Tests parse method.