Fix tranasaction behavior in delete tenant (#2136)

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

hawkbit-repository/hawkbit-repository-jpa/src/test/java/org/eclipse/hawkbit/repository/jpa/management/SystemManagementTest.java

@@ -33,11 +33,11 @@ import org.junit.jupiter.api.extension.ExtendWith;
 @Feature("Component Tests - Repository")
 @Story("System Management")
 @ExtendWith(DisposableSqlTestDatabaseExtension.class)
-public class SystemManagementTest extends AbstractJpaIntegrationTest {
+class SystemManagementTest extends AbstractJpaIntegrationTest {
 
     @Test
     @Description("Ensures that findTenants returns all tenants and not only restricted to the tenant which currently is logged in")
-    public void findTenantsReturnsAllTenantsNotOnlyWhichLoggedIn() throws Exception {
+    void findTenantsReturnsAllTenantsNotOnlyWhichLoggedIn() throws Exception {
         assertThat(systemManagement.findTenants(PAGE).getContent()).hasSize(1);
 
         createTestTenantsForSystemStatistics(2, 0, 0, 0);
@@ -47,7 +47,7 @@ public class SystemManagementTest extends AbstractJpaIntegrationTest {
 
     @Test
     @Description("Ensures that getSystemUsageStatisticsWithTenants returns the usage of all tenants and not only the first 1000 (max page size).")
-    public void systemUsageReportCollectsStatisticsOfManyTenants() throws Exception {
+    void systemUsageReportCollectsStatisticsOfManyTenants() throws Exception {
         // Prepare tenants
         createTestTenantsForSystemStatistics(1050, 0, 0, 0);
 
@@ -57,7 +57,7 @@ public class SystemManagementTest extends AbstractJpaIntegrationTest {
 
     @Test
     @Description("Checks that the system report calculates correctly the artifact size of all tenants in the system. It ignores deleted software modules with their artifacts.")
-    public void systemUsageReportCollectsArtifactsOfAllTenants() throws Exception {
+    void systemUsageReportCollectsArtifactsOfAllTenants() throws Exception {
         // Prepare tenants
         createTestTenantsForSystemStatistics(2, 1234, 0, 0);
 
@@ -81,7 +81,7 @@ public class SystemManagementTest extends AbstractJpaIntegrationTest {
 
     @Test
     @Description("Checks that the system report calculates correctly the targets size of all tenants in the system")
-    public void systemUsageReportCollectsTargetsOfAllTenants() throws Exception {
+    void systemUsageReportCollectsTargetsOfAllTenants() throws Exception {
         // Prepare tenants
         createTestTenantsForSystemStatistics(2, 0, 100, 0);
 
@@ -101,7 +101,7 @@ public class SystemManagementTest extends AbstractJpaIntegrationTest {
 
     @Test
     @Description("Checks that the system report calculates correctly the actions size of all tenants in the system")
-    public void systemUsageReportCollectsActionsOfAllTenants() throws Exception {
+    void systemUsageReportCollectsActionsOfAllTenants() throws Exception {
         // Prepare tenants
         createTestTenantsForSystemStatistics(2, 0, 20, 2);