Add start and stop logs for DeleteTrashFolder task

Change-Id: I75ea953269a489f70a2ca44d959c10d01da8e1c1

src/main/java/com/googlesource/gerrit/plugins/deleteproject/fs/DeleteTrashFolders.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/deleteproject/fs/DeleteTrashFolders.java b/src/main/java/com/googlesource/gerrit/plugins/deleteproject/fs/DeleteTrashFolders.java
index 51551ef..e44b159 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/deleteproject/fs/DeleteTrashFolders.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/deleteproject/fs/DeleteTrashFolders.java
@@ -117,7 +117,9 @@
         new Runnable() {
           @Override
           public void run() {
+            log.atInfo().log("%s : STARTED", taskName);
             evaluateIfTrashWithTimeLimit();
+            log.atInfo().log("%s : ENDED", taskName);
           }
 
           @Override