Checkstyle and pmd fixes for new MatchAction service

Change-Id: I13efd4c7a29e19b782c126132d151ac377db3a4c
diff --git a/src/main/java/net/onrc/onos/core/matchaction/match/OpticalMatch.java b/src/main/java/net/onrc/onos/core/matchaction/match/OpticalMatch.java
index 3cdec64..65c080b 100644
--- a/src/main/java/net/onrc/onos/core/matchaction/match/OpticalMatch.java
+++ b/src/main/java/net/onrc/onos/core/matchaction/match/OpticalMatch.java
@@ -9,7 +9,7 @@
 public class OpticalMatch implements Match {
 
     // Match fields
-    protected Integer srcLambda;
+    private Integer srcLambda;
 
     /**
      * Constructor.