Fix incorrect description of getPreviousStatistic method

Change-Id: I803ca5ee86e4a605c06916687d55a37059fe2ad2
diff --git a/core/api/src/main/java/org/onosproject/net/statistic/StatisticStore.java b/core/api/src/main/java/org/onosproject/net/statistic/StatisticStore.java
index 8566ef5..940d191 100644
--- a/core/api/src/main/java/org/onosproject/net/statistic/StatisticStore.java
+++ b/core/api/src/main/java/org/onosproject/net/statistic/StatisticStore.java
@@ -56,7 +56,7 @@
     Set<FlowEntry> getCurrentStatistic(ConnectPoint connectPoint);
 
     /**
-     * Fetches the current observed stats values.
+     * Fetches the previous observed stats values.
      *
      * @param connectPoint the port to fetch information for
      * @return set of current values