Improve debug message when the scheduler prepare to snapshot (volume 'id' and add volume name)

Signed-off-by: Milamber <milamber@apache.org>
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

This closes #676

server/src/com/cloud/storage/snapshot/SnapshotSchedulerImpl.java

diff --git a/server/src/com/cloud/storage/snapshot/SnapshotSchedulerImpl.java b/server/src/com/cloud/storage/snapshot/SnapshotSchedulerImpl.java
index 2fedeef..4ce2bba 100644
--- a/server/src/com/cloud/storage/snapshot/SnapshotSchedulerImpl.java
+++ b/server/src/com/cloud/storage/snapshot/SnapshotSchedulerImpl.java
@@ -254,7 +254,8 @@
                 if (s_logger.isDebugEnabled()) {
                     final Date scheduledTimestamp = snapshotToBeExecuted.getScheduledTimestamp();
                     displayTime = DateUtil.displayDateInTimezone(DateUtil.GMT_TIMEZONE, scheduledTimestamp);
-                    s_logger.debug("Scheduling 1 snapshot for volume " + volumeId + " for schedule id: " + snapshotToBeExecuted.getId() + " at " + displayTime);
+                    s_logger.debug("Scheduling 1 snapshot for volume id " + volumeId + " (volume name:" +
+                            volume.getName() + ") for schedule id: " + snapshotToBeExecuted.getId() + " at " + displayTime);
                 }
 
                 tmpSnapshotScheduleVO = _snapshotScheduleDao.acquireInLockTable(snapshotScheId);