Drivers for Centec and Pica8 switches

Change-Id: I390c70716560275af7ee8bd40e6d161b6ed3b58f
diff --git a/drivers/src/main/java/org/onosproject/driver/pipeline/OVSCorsaPipeline.java b/drivers/src/main/java/org/onosproject/driver/pipeline/OVSCorsaPipeline.java
index c17898b..ddcb4d9 100644
--- a/drivers/src/main/java/org/onosproject/driver/pipeline/OVSCorsaPipeline.java
+++ b/drivers/src/main/java/org/onosproject/driver/pipeline/OVSCorsaPipeline.java
@@ -815,6 +815,7 @@
             this.key = key;
         }
 
+        @SuppressWarnings("unused")
         public GroupKey key() {
             return key;
         }