Replace java.util.Date and java.util.Calendar with java.time.* equivalents.

dspace-api/src/main/java/org/dspace/embargo/DayTableEmbargoSetter.java

@@ -8,7 +8,9 @@
 package org.dspace.embargo;
 
 import java.sql.SQLException;
-import java.util.Date;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
 import java.util.Properties;
 
 import org.dspace.authorize.AuthorizeException;
@@ -61,9 +63,9 @@ public class DayTableEmbargoSetter extends DefaultEmbargoSetter {
             }
             String days = termProps.getProperty(terms);
             if (days != null && days.length() > 0) {
-                long lift = System.currentTimeMillis() +
+                long lift = Instant.now().toEpochMilli() +
                     (Long.parseLong(days) * 24 * 60 * 60 * 1000);
-                return new DCDate(new Date(lift));
+                return new DCDate(LocalDateTime.ofEpochSecond(lift, 0, ZoneOffset.UTC));
             }
         }
         return null;