Ensure camel-spring-batch shutdowns properly.

Conflicts:
	components/camel-spring-batch/src/main/java/org/apache/camel/component/spring/batch/support/CamelItemReader.java
Ensure camel-spring-batch shutdowns properly.

Conflicts:
	components/camel-spring-batch/src/main/java/org/apache/camel/component/spring/batch/support/CamelItemReader.java