Add test for site.equals

Also remove unused import

src/test/java/com/uid2/shared/store/RotatingSiteStoreTest.java

@@ -15,7 +15,6 @@
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import java.io.IOException;
 import java.time.Instant;
 import java.util.HashSet;
 import java.util.List;

src/test/java/com/uid2/shared/store/SiteTest.java

@@ -0,0 +1,23 @@
+package com.uid2.shared.store;
+
+import com.uid2.shared.model.Site;
+import org.junit.jupiter.api.Test;
+
+import java.util.HashSet;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class SiteTest {
+    @Test
+    public void testEquals() {
+        Site a = new Site(1, "1 name", "1 desc", true, new HashSet<>(), new HashSet<>(), true, 0L);
+        Site b = new Site(1, "1 name", "1 desc", true, new HashSet<>(), new HashSet<>(), true, 0L);
+        Site c = new Site(1, "1 name", "1 desc", true, new HashSet<>(), new HashSet<>(), null, 0L);
+
+        assertTrue(a.equals(b));
+        assertFalse(a.equals(c));
+        assertFalse(c.equals(a));
+        assertTrue(c.equals(c));
+    }
+}