Arista Switch pipelines should filter the clear deffered action (seems like juniper pipeline)

Change-Id: I2f1bdd5a4ba614466c3722f4ed833ece739f0404
diff --git a/drivers/default/src/main/resources/onos-drivers.xml b/drivers/default/src/main/resources/onos-drivers.xml
index f45bc23..f25d11d 100644
--- a/drivers/default/src/main/resources/onos-drivers.xml
+++ b/drivers/default/src/main/resources/onos-drivers.xml
@@ -279,5 +279,11 @@
                    impl="org.onosproject.driver.pipeline.CentecV350Pipeline"/>
     </driver>
     -->
+
+    <driver name="Arista" extends="default"
+            manufacturer="Arista.*" hwVersion="DCS.*" swVersion=".*">
+        <behaviour api="org.onosproject.net.behaviour.Pipeliner"
+                   impl="org.onosproject.driver.pipeline.AristaPipeliner"/>
+    </driver>
 </drivers>