Upgrade MS SQL Server Docker image version to 2019-CU16-ubuntu-20.04

Closes #1283

Author: schauder

ci/accept-third-party-license.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
 {
-  echo "mcr.microsoft.com/mssql/server:2017-CU12"
+  echo "mcr.microsoft.com/mssql/server:2019-CU16-ubuntu-20.04"
   echo "ibmcom/db2:11.5.7.0a"
 } > spring-data-jdbc/src/test/resources/container-license-acceptance.txt

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/testing/LicenseListener.java

@@ -25,6 +25,8 @@
 import org.testcontainers.containers.MSSQLServerContainer;
 import org.testcontainers.utility.LicenseAcceptance;
 
+import static org.springframework.data.jdbc.testing.MsSqlDataSourceConfiguration.*;
+
 /**
  * {@link TestExecutionListener} to selectively skip tests if the license for a particular database container was not
  * accepted.
@@ -47,7 +49,7 @@ public void prepareTestInstance(TestContext testContext) {
 		}
 
 		if (environment.acceptsProfiles(Profiles.of("mssql"))) {
-			assumeLicenseAccepted(MSSQLServerContainer.IMAGE + ":" + MSSQLServerContainer.DEFAULT_TAG);
+			assumeLicenseAccepted(MS_SQL_SERVER_VERSION);
 		}
 	}
 

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/testing/MsSqlDataSourceConfiguration.java

@@ -39,14 +39,15 @@
 @Profile({"mssql"})
 public class MsSqlDataSourceConfiguration extends DataSourceConfiguration {
 
+	public static final String MS_SQL_SERVER_VERSION = "mcr.microsoft.com/mssql/server:2019-CU16-ubuntu-20.04";
 	private static MSSQLServerContainer<?> MSSQL_CONTAINER;
 
     @Override
     protected DataSource createDataSource() {
 
 		if (MSSQL_CONTAINER == null) {
 
-			MSSQLServerContainer<?> container = new MSSQLServerContainer<>() //
+			MSSQLServerContainer<?> container = new MSSQLServerContainer<>(MS_SQL_SERVER_VERSION) //
 					.withReuse(true);
 			container.start();