Add more documentation to suppress lifecycle

Change-Id: I17088191b469a187ed14564f20af24a2634252cf
Signed-off-by: Markus Duft <markus.duft@ssi-schaefer.com>
diff --git a/org.eclipse.tea.core/src/org/eclipse/tea/core/annotations/TaskChainSuppressLifecycle.java b/org.eclipse.tea.core/src/org/eclipse/tea/core/annotations/TaskChainSuppressLifecycle.java
index f27e717..2d31eaa 100644
--- a/org.eclipse.tea.core/src/org/eclipse/tea/core/annotations/TaskChainSuppressLifecycle.java
+++ b/org.eclipse.tea.core/src/org/eclipse/tea/core/annotations/TaskChainSuppressLifecycle.java
@@ -32,6 +32,9 @@
  * happen that there is a task chain that holds a single proxy task that
  * executes the actual {@link TaskChain} (which will/should have the full
  * lifecycle).
+ * <p>
+ * Another use case is to re-use the TEA infrastructure to execute setup tasks
+ * that should run in the background without user visibility.
  */
 @Documented
 @Retention(RUNTIME)