Find the existing persistent volume by vim_id keyword

It's possible to find an existing disk id searching with vim_id or
vim_volume_id depend on situation. vim_id is added in the search key list.

Change-Id: I7847cfc30a26bfa5f860eae2aefdbc4c44050234
Signed-off-by: aticig <gulsum.atici@canonical.com>