Add a builder for DefaultLink to hide multiplying constructors

Change-Id: Iaf073d07989c398a8f44541ffdb8dd93e5715162
diff --git a/providers/pcep/tunnel/src/test/java/org/onosproject/provider/pcep/tunnel/impl/PcepTunnelProviderTest.java b/providers/pcep/tunnel/src/test/java/org/onosproject/provider/pcep/tunnel/impl/PcepTunnelProviderTest.java
index 0fcd144..a4c7098 100644
--- a/providers/pcep/tunnel/src/test/java/org/onosproject/provider/pcep/tunnel/impl/PcepTunnelProviderTest.java
+++ b/providers/pcep/tunnel/src/test/java/org/onosproject/provider/pcep/tunnel/impl/PcepTunnelProviderTest.java
@@ -79,7 +79,8 @@
 
         ConnectPoint dst = new ConnectPoint(dstElementId, PortNumber.portNumber(10023));
 
-        Link link = new DefaultLink(pid, src, dst, Link.Type.DIRECT, EMPTY);
+        Link link = DefaultLink.builder().providerId(pid).src(src).dst(dst)
+                .type(Link.Type.DIRECT).build();
         links.add(link);
 
         path = new DefaultPath(pid, links, 10, EMPTY);