If lun in Unity backend has hosts accessed, it can't be deleted.
It will cause volume failed to delete in OpenStack.
So remove host access before lun deletion.
Change-Id: I0887f48c28741f434c6a48041c87e849e471bb94
Closes-bug: #1879705
(cherry picked from commit ead6bf08203f37c309043e43f8edbe2736ebacc9)
(cherry picked from commit e647c40dbd28ad21105cc9acda9daa3aee257b2a)
If lun in Unity backend has hosts accessed, it can't be deleted. It will cause volume failed to delete in OpenStack. So remove host access before lun deletion.
Change-Id: I0887f48c28741f434c6a48041c87e849e471bb94 Closes-bug: #1879705 (cherry picked from commit ead6bf08203f37c309043e43f8edbe2736ebacc9) (cherry picked from commit e647c40dbd28ad21105cc9acda9daa3aee257b2a)