Improve Xconnect to support BSOD use case

- Push ACL flow to ignore xconnect VLAN
- Add pair port to the L2FG internally
- Remove the ETH_TYPE restriction in OFDPA processVersatile
- Remove the NOACTION warning in OFDPA processVersatile
- Do not push bridging flow for hosts that have wrong VLAN tag

Known issue:
- flooding issue on the pair port
- tagged host will be learnt before xconnect config is pushed (will be ignored by SR)

Change-Id: I30e4f46e54daa0f7bd349419df100523dceb2c4c
diff --git a/app/src/main/java/org/onosproject/segmentrouting/SegmentRoutingService.java b/app/src/main/java/org/onosproject/segmentrouting/SegmentRoutingService.java
index 03ef5b5..8d64517 100644
--- a/app/src/main/java/org/onosproject/segmentrouting/SegmentRoutingService.java
+++ b/app/src/main/java/org/onosproject/segmentrouting/SegmentRoutingService.java
@@ -45,7 +45,12 @@
  */
 public interface SegmentRoutingService {
     /**
-     * VLAN cross-connect priority.
+     * VLAN cross-connect ACL priority.
+     */
+    int XCONNECT_ACL_PRIORITY = 60000;
+
+    /**
+     * VLAN cross-connect Bridging priority.
      */
     int XCONNECT_PRIORITY = 1000;