Updated tests to remove SQL Bad Grammar warnings

Also replacing the last of the SpringJunit4ClassRunner with SpringRunner
Other cleanup

resolves #482

spring-cloud-task-core/src/test/java/org/springframework/cloud/task/TaskRepositoryInitializerDefaultTaskConfigurerTests.java

@@ -29,6 +29,7 @@ import org.springframework.boot.autoconfigure.jdbc.EmbeddedDataSourceConfigurati
 import org.springframework.cloud.task.configuration.SimpleTaskAutoConfiguration;
 import org.springframework.cloud.task.configuration.TaskConfigurer;
 import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringRunner;
 
@@ -44,6 +45,7 @@ import static org.assertj.core.api.AssertionsForInterfaceTypes.assertThat;
 @RunWith(SpringRunner.class)
 @ContextConfiguration(classes = {SimpleTaskAutoConfiguration.class,
 		EmbeddedDataSourceConfiguration.class})
+@DirtiesContext
 public class TaskRepositoryInitializerDefaultTaskConfigurerTests {
 
 	@Autowired

spring-cloud-task-core/src/test/java/org/springframework/cloud/task/listener/TaskListenerExecutorObjectFactoryTests.java

@@ -32,6 +32,7 @@ import org.springframework.cloud.task.repository.TaskExecution;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringRunner;
 
@@ -46,6 +47,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @RunWith(SpringRunner.class)
 @ContextConfiguration(classes = { TaskListenerExecutorObjectFactoryTests.TaskExecutionListenerConfiguration.class })
+@DirtiesContext
 public class TaskListenerExecutorObjectFactoryTests {
 
 	public static final String BEFORE_LISTENER = "BEFORE LISTENER";

spring-cloud-task-core/src/test/java/org/springframework/cloud/task/repository/dao/JdbcTaskExecutionDaoTests.java

@@ -27,6 +27,7 @@ import javax.sql.DataSource;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
 import org.springframework.boot.autoconfigure.jdbc.EmbeddedDataSourceConfiguration;
@@ -41,7 +42,7 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ContextConfiguration;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.junit.Assert.assertEquals;
 
@@ -51,7 +52,7 @@ import static org.junit.Assert.assertEquals;
  * @author Glenn Renfro
  * @author Gunnar Hillert
  */
-@RunWith(SpringJUnit4ClassRunner.class)
+@RunWith(SpringRunner.class)
 @ContextConfiguration(classes = {TestConfiguration.class,
 		EmbeddedDataSourceConfiguration.class,
 		PropertyPlaceholderAutoConfiguration.class})

spring-cloud-task-core/src/test/java/org/springframework/cloud/task/repository/support/SimpleTaskRepositoryJdbcTests.java

@@ -19,6 +19,7 @@ package org.springframework.cloud.task.repository.support;
 import java.util.Collections;
 import java.util.Date;
 import java.util.UUID;
+
 import javax.sql.DataSource;
 
 import org.junit.Test;
@@ -35,7 +36,7 @@ import org.springframework.cloud.task.util.TestDBUtils;
 import org.springframework.cloud.task.util.TestVerifierUtils;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.ContextConfiguration;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.junit4.SpringRunner;
 
 import static org.junit.Assert.assertEquals;
 
@@ -46,10 +47,11 @@ import static org.junit.Assert.assertEquals;
  * @author Michael Minella
  * @author Ilayaperumal Gopinathan
  */
-@RunWith(SpringJUnit4ClassRunner.class)
+@RunWith(SpringRunner.class)
 @ContextConfiguration(classes = {EmbeddedDataSourceConfiguration.class,
 		SimpleTaskAutoConfiguration.class,
 		PropertyPlaceholderAutoConfiguration.class})
+@DirtiesContext
 public class SimpleTaskRepositoryJdbcTests {
 
 	@Autowired