Clarify destruction order effect in @DependsOn annotation javadoc

Issue: SPR-17384

(cherry picked from commit 00b7782b5f)

spring-context/src/main/java/org/springframework/context/annotation/DependsOn.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,6 +28,12 @@ import java.lang.annotation.Target;
  * does not explicitly depend on another through properties or constructor arguments,
  * but rather depends on the side effects of another bean's initialization.
  *
+ * <p>A depends-on declaration can specify both an initialization-time dependency and,
+ * in the case of singleton beans only, a corresponding destruction-time dependency.
+ * Dependent beans that define a depends-on relationship with a given bean are destroyed
+ * first, prior to the given bean itself being destroyed. Thus, a depends-on declaration
+ * can also control shutdown order.
+ *
  * <p>May be used on any class directly or indirectly annotated with
  * {@link org.springframework.stereotype.Component} or on methods annotated
  * with {@link Bean}.

src/docs/asciidoc/core/core-beans.adoc

@@ -1914,11 +1914,11 @@ delimiters:
 
 [NOTE]
 ====
-The `depends-on` attribute in the bean definition can specify both an initialization
-time dependency and, in the case of <<beans-factory-scopes-singleton,singleton>> beans
-only, a corresponding destroy time dependency. Dependent beans that define a
-`depends-on` relationship with a given bean are destroyed first, prior to the given bean
-itself being destroyed. Thus `depends-on` can also control shutdown order.
+The `depends-on` attribute in the bean definition can specify both an initialization-time
+dependency and, in the case of <<beans-factory-scopes-singleton,singleton>> beans only,
+a corresponding destruction-time dependency. Dependent beans that define a `depends-on`
+relationship with a given bean are destroyed first, prior to the given bean itself being
+destroyed. Thus `depends-on` can also control shutdown order.
 ====