Clean/Update some comments

Part of ONOS-1925

Change-Id: If507b7728a1f7e91c7697d9082cdc84b6c1fb8ee
diff --git a/src/main/java/net/onrc/onos/core/util/distributed/sharedlog/SharedLogObject.java b/src/main/java/net/onrc/onos/core/util/distributed/sharedlog/SharedLogObject.java
index 75c155f..2c470ab 100644
--- a/src/main/java/net/onrc/onos/core/util/distributed/sharedlog/SharedLogObject.java
+++ b/src/main/java/net/onrc/onos/core/util/distributed/sharedlog/SharedLogObject.java
@@ -68,7 +68,7 @@
     void apply(final SeqNum seq, final LogValue logValue);
 
     /**
-     * Tests if given LogValue is applicable to this .
+     * Tests if given LogValue is applicable to this instance.
      * <p/>
      * This method will be called before {@link #apply(SeqNum, LogValue)} call.
      * This method should be implemented to be side-effect free.