Add unit test for LISP address to check obj equality & construction

This commit adds various unit tests of LISP addresses in a way to
check object equality and construction.
This commit also makes minor changes to existing LISP address
classes to allow the test cases to pass all unit tests.

Change-Id: Ice9f9634bdd243baaf1eed1539ea8d5808dda01d
diff --git a/protocols/lisp/msg/src/test/java/org/onosproject/lisp/msg/types/LispDistinguishedNameAddressTest.java b/protocols/lisp/msg/src/test/java/org/onosproject/lisp/msg/types/LispDistinguishedNameAddressTest.java
new file mode 100644
index 0000000..074b0ca
--- /dev/null
+++ b/protocols/lisp/msg/src/test/java/org/onosproject/lisp/msg/types/LispDistinguishedNameAddressTest.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.lisp.msg.types;
+
+import com.google.common.testing.EqualsTester;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+
+/**
+ * Unit tests for LispDistinguishedNameAddress class.
+ */
+public class LispDistinguishedNameAddressTest {
+
+    private LispDistinguishedNameAddress address1;
+    private LispDistinguishedNameAddress sameAsAddress1;
+    private LispDistinguishedNameAddress address2;
+
+    @Before
+    public void setup() {
+
+        address1 = new LispDistinguishedNameAddress("distAddress1");
+        sameAsAddress1 = new LispDistinguishedNameAddress("distAddress1");
+        address2 = new LispDistinguishedNameAddress("distAddress2");
+    }
+
+    @Test
+    public void testEquality() {
+        new EqualsTester()
+                .addEqualityGroup(address1, sameAsAddress1)
+                .addEqualityGroup(address2).testEquals();
+    }
+
+    @Test
+    public void testConstruction() {
+        LispDistinguishedNameAddress distinguishedNameAddress = address1;
+
+        assertThat(distinguishedNameAddress.getDistinguishedName(), is("distAddress1"));
+    }
+}