[ONOS-7667] Code clean-up in compliance with Java8

Change-Id: Ieb17110357d8fa13705ebe9c86559b0863e77751
diff --git a/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/table/Netflow.java b/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/table/Netflow.java
index cbb6056..bdb4bac 100644
--- a/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/table/Netflow.java
+++ b/protocols/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/table/Netflow.java
@@ -37,7 +37,7 @@
 
         private final String columnName;
 
-        private NetflowColumn(String columnName) {
+        NetflowColumn(String columnName) {
             this.columnName = columnName;
         }