Cleanup code smells reported by Sonar

This is a first pass are removing some of the code smells.
Many reported code smells were ignored in this effort

spring-cloud-task-samples/batch-events/src/main/java/io/spring/cloud/BatchEventsApplication.java

@@ -48,6 +48,8 @@ public class BatchEventsApplication {
 	@Configuration
 	public static class JobConfiguration {
 
+		private static final int DEFAULT_CHUNK_COUNT = 3;
+
 		@Autowired
 		private JobBuilderFactory jobBuilderFactory;
 
@@ -69,7 +71,7 @@ public class BatchEventsApplication {
 		@Bean
 		public Step step2() {
 			return this.stepBuilderFactory.get("step2")
-					.<String, String>chunk(3)
+					.<String, String>chunk(DEFAULT_CHUNK_COUNT)
 					.reader(new ListItemReader<>(Arrays.asList("1", "2", "3", "4", "5", "6")))
 					.processor(new ItemProcessor<String, String>() {
 						@Override

spring-cloud-task-samples/partitioned-batch-job/src/main/java/io/spring/JobConfiguration.java

@@ -20,6 +20,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Random;
+
 import javax.sql.DataSource;
 
 import org.springframework.batch.core.Job;
@@ -29,7 +30,6 @@ import org.springframework.batch.core.configuration.annotation.JobBuilderFactory
 import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
 import org.springframework.batch.core.configuration.annotation.StepScope;
 import org.springframework.batch.core.explore.JobExplorer;
-import org.springframework.batch.core.explore.support.JobExplorerFactoryBean;
 import org.springframework.batch.core.partition.PartitionHandler;
 import org.springframework.batch.core.partition.support.Partitioner;
 import org.springframework.batch.core.repository.JobRepository;