Fix 'search_opts' error with backup delete command

The following error message is yield when we try to
backup volume which is not present.

ERROR: list() got an unexpected keyword argument 'search_opts'

This is from findall() method in the
cinderclient.base.ManagerWithFind class.

When cinderclient get a specific resource, it use the findall() method.

The error will yields which list() in
VolumeEncryptionTypeManager did not have.

Change-Id: Iffe568c6d2de41b8e24658f3a54f2861e2f7db31
Closes-Bug: #1282324
Related-Bug: #1248519
Merge "Fix 'search_opts' error with backup delete command"