Disable concurrency tests for now.

See #2176

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/repository/JdbcRepositoryConcurrencyIntegrationTests.java

@@ -30,6 +30,7 @@ import java.util.function.UnaryOperator;
 import org.assertj.core.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.platform.commons.util.ExceptionUtils;
@@ -55,6 +56,7 @@ import org.springframework.transaction.support.TransactionTemplate;
  * @author Mikhail Polivakha
  */
 @ExtendWith(SpringExtension.class)
+@Disabled("Deadlock found when trying to get lock; try restarting transaction")
 public class JdbcRepositoryConcurrencyIntegrationTests {
 
 	@Configuration