删除volume前，先stop volume，如果volume是stopped状态的，则返回0

src/com/platform/glusterfs/SetVolume.java

@@ -280,7 +280,7 @@ public class SetVolume {
 			if (new VolumeInfo().getVolumeStatus(volumeName).equals("Stopped")) {
 				log.error("3502 the volume is already stoped");
 				System.out.println("3502 the volume is already stoped");
-				return -1;
+				return 0;
 			} else {
 				String command = "echo -e \"y\"| gluster volume stop " + volumeName;
 				List<String> reStrings = Constant.ganymedSSH.execCmdWaitAcquiescent(command);