Ignore SQL Server integration tests

This commit temporarily disables SQL Server integration tests due to frequent container startup failures on Jenkins.

See gh-959

spring-session-jdbc/src/integration-test/java/org/springframework/session/jdbc/SQLServerJdbcOperationsSessionRepositoryITests.java

@@ -20,6 +20,7 @@ import javax.sql.DataSource;
 
 import com.microsoft.sqlserver.jdbc.SQLServerDataSource;
 import org.junit.ClassRule;
+import org.junit.Ignore;
 import org.junit.runner.RunWith;
 import org.testcontainers.containers.MSSQLServerContainer;
 
@@ -38,6 +39,7 @@ import org.springframework.test.context.web.WebAppConfiguration;
  *
  * @author Vedran Pavic
  */
+@Ignore
 @RunWith(SpringRunner.class)
 @WebAppConfiguration
 @ContextConfiguration