GH-10906: DefaultLockRepository: Use LocalDateTime directly (#10908)

Fixes: #10906

The `Timestamp.valueOf()` method uses the system default time zone which may lead to discrepancy
when daylight saving happens

According to JDBC 4.2+, we don't need to convert `LocalDateTime` to `Timestamp` anymore

* Fix `DefaultLockRepository` to use `LocalDateTime` as values for SQL statements
instead of wrapping them into `Timestamp`

There are no any new tests since this internal change does not affect API logic,
and existing working tests prove that everything is still right

(cherry picked from commit e5b8994)

Author: artembilan

spring-integration-jdbc/src/main/java/org/springframework/integration/jdbc/lock/DefaultLockRepository.java

@@ -16,7 +16,6 @@
 
 package org.springframework.integration.jdbc.lock;
 
-import java.sql.Timestamp;
 import java.time.Duration;
 import java.time.LocalDateTime;
 import java.time.ZoneOffset;
@@ -414,12 +413,12 @@ public boolean acquire(String lock, Duration ttlDuration) {
 		return this.readCommittedTransactionTemplate.<Boolean>execute(
 				transactionStatus -> {
 					if (this.template.update(this.updateQuery, this.id, ttlEpochMillis(ttlDuration),
-							this.region, lock, this.id, epochMillis()) > 0) {
+							this.region, lock, this.id, currentTime()) > 0) {
 						return true;
 					}
 					try {
 						return this.template.update(this.insertQuery, this.region, lock, this.id,
-								epochMillis(), ttlEpochMillis(ttlDuration)) > 0;
+								currentTime(), ttlEpochMillis(ttlDuration)) > 0;
 					}
 					catch (DataIntegrityViolationException ex) {
 						return false;
@@ -433,14 +432,14 @@ public boolean isAcquired(String lock) {
 				transactionStatus ->
 						Integer.valueOf(1).equals(
 								this.template.queryForObject(this.countQuery,
-										Integer.class, this.region, lock, this.id, epochMillis())));
+										Integer.class, this.region, lock, this.id, currentTime())));
 	}
 
 	@Override
 	public void deleteExpired() {
 		this.defaultTransactionTemplate.executeWithoutResult(
 				transactionStatus ->
-						this.template.update(this.deleteExpiredQuery, this.region, epochMillis()));
+						this.template.update(this.deleteExpiredQuery, this.region, currentTime()));
 	}
 
 	@Override
@@ -456,12 +455,8 @@ public boolean renew(String lock, Duration ttlDuration) {
 						this.template.update(this.renewQuery, ttlEpochMillis(ttlDuration), this.region, lock, this.id) == 1);
 	}
 
-	private Timestamp ttlEpochMillis(Duration ttl) {
-		return Timestamp.valueOf(currentTime().plus(ttl));
-	}
-
-	private static Timestamp epochMillis() {
-		return Timestamp.valueOf(currentTime());
+	private static LocalDateTime ttlEpochMillis(Duration ttl) {
+		return currentTime().plus(ttl);
 	}
 
 	private static LocalDateTime currentTime() {