Force lazy-init to false when parsing scheduled:task

A <scheduled:task> element declared within a
<beans default-lazy-init="true"> element represents a contradiction in
terms: such a task will never be executed.

For this reason, we now override any inherited lazy-init settings
when parsing <scheduled:task> elements, forcing lazy-init to false
for the underlying ScheduledTaskRegistrar bean.

Thanks to Mike Youngstrom for contributing an initial patch.

Issue: SPR-8498

org.springframework.context/src/main/java/org/springframework/scheduling/config/ScheduledTasksBeanDefinitionParser.java

@@ -50,6 +50,7 @@ public class ScheduledTasksBeanDefinitionParser extends AbstractSingleBeanDefini
 
 	@Override
 	protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
+		builder.setLazyInit(false); // lazy scheduled tasks are a contradiction in terms -> force to false
 		ManagedMap<RuntimeBeanReference, String> cronTaskMap = new ManagedMap<RuntimeBeanReference, String>();
 		ManagedMap<RuntimeBeanReference, String> fixedDelayTaskMap = new ManagedMap<RuntimeBeanReference, String>();
 		ManagedMap<RuntimeBeanReference, String> fixedRateTaskMap = new ManagedMap<RuntimeBeanReference, String>();