Fixed mixing date import (#1954)

Author: tkyc

src/main/java/com/microsoft/sqlserver/jdbc/SQLServerConnection.java

@@ -47,6 +47,7 @@
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
+import java.util.Date;
 import java.util.logging.Level;
 
 import javax.sql.XAConnection;