Delete volume snapshot got an error

[clli33349]

Is this a BUG REPORT or FEATURE REQUEST?:

Uncomment only one, leave it on its own line:

/kind bug
/kind feature

What happened:
When I use lvm as the opensds backend block storage, and execute command blow, I got an errorDeleting.

1. Create a volume snapshot.
2. Delete the snapshot using lvremove.
3. Delete the snapshot using osdsctl.
4. List snapshot I, got an error.

IMO, that would be deleted succefully, the lvm driver should judge if the snapshot exsit, if not just return, and tell the controller deleting is succeful,.

root@ubuntu:~/gopath/src/github.com/opensds/opensds# osdsctl volume snapshot list 
+--------------------------------------+------+-------------+------+-----------+--------------------------------------+
| Id                                   | Name | Description | Size | Status    | VolumeId                             |
+--------------------------------------+------+-------------+------+-----------+--------------------------------------+
| 1ee2d597-6e82-4d1b-bdad-2530145f46d1 |      |             | 1    | available | 1f2116bc-96cc-4210-b934-231728b90d9e |
+--------------------------------------+------+-------------+------+-----------+--------------------------------------+
root@ubuntu:~/gopath/src/github.com/opensds/opensds# lvs
  LV                                             VG                      Attr       LSize   Pool Origin                                      Data%  Meta%  Move Log Cpy%Sync Convert
  _snapshot-1ee2d597-6e82-4d1b-bdad-2530145f46d1 opensds-volumes-default sri-a-s---   1.00g      volume-1f2116bc-96cc-4210-b934-231728b90d9e 0.00                                   
  volume-1f2116bc-96cc-4210-b934-231728b90d9e    opensds-volumes-default owi-a-s---   1.00g                                                                                         
  root                                           ubuntu-vg               -wi-ao---- 111.50g                                                                                         
  swap_1                                         ubuntu-vg               -wi-ao----  16.00g                                                                                         
root@ubuntu:~/gopath/src/github.com/opensds/opensds# lvremove /dev/opensds-volumes-default/_snapshot-1ee2d597-6e82-4d1b-bdad-2530145f46d1 
Do you really want to remove and DISCARD active logical volume _snapshot-1ee2d597-6e82-4d1b-bdad-2530145f46d1? [y/n]: y
  Logical volume "_snapshot-1ee2d597-6e82-4d1b-bdad-2530145f46d1" successfully removed
root@ubuntu:~/gopath/src/github.com/opensds/opensds# osdsctl volume snapshot delete 1ee2d597-6e82-4d1b-bdad-2530145f46d1
root@ubuntu:~/gopath/src/github.com/opensds/opensds# osdsctl volume snapshot list 
+--------------------------------------+------+-------------+------+---------------+--------------------------------------+
| Id                                   | Name | Description | Size | Status        | VolumeId                             |
+--------------------------------------+------+-------------+------+---------------+--------------------------------------+
| 1ee2d597-6e82-4d1b-bdad-2530145f46d1 |      |             | 1    | errorDeleting | 1f2116bc-96cc-4210-b934-231728b90d9e |
+--------------------------------------+------+-------------+------+---------------+--------------------------------------+

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• Hotpot(release/branch) version:
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
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