Don't crash if lvm refuses to activate an lv.
Don't crash if lvm refuses to activate an lv.

Mark the device as not controllable, which should prevent further
attempts to setup/teardown. It should still be possible to destroy
the device.

AdamWill/blivet,vojtechtrefny/blivet,AdamWill/blivet,rhinstaller/blivet,jkonecny12/blivet,vojtechtrefny/blivet,rvykydal/blivet,rhinstaller/blivet,rvykydal/blivet,jkonecny12/blivet