Blindly accept mappings so Riot is happy - Fix #23

src/main/groovy/io/kamax/mxisd/lookup/ThreePid.java

@@ -0,0 +1,29 @@
+package io.kamax.mxisd.lookup;
+
+import java.time.Instant;
+
+public class ThreePid {
+
+    private String medium;
+    private String address;
+    private Instant validation;
+
+    public ThreePid(String medium, String address, Instant validation) {
+        this.medium = medium;
+        this.address = address;
+        this.validation = validation;
+    }
+
+    public String getMedium() {
+        return medium;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public Instant getValidation() {
+        return validation;
+    }
+
+}