Use for bcache cset as display name string "bcache cache" (fate#325346)
Use for bcache cset as display name string "bcache cache" (fate#325346)

Reason is that previously it use uuid which has two drawbacks:

1. it is too long
2. it is not known when cset is not yet commited, so result is empty
string which is confusing

openSUSE/libstorage-bgl-eval,openSUSE/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,openSUSE/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,aschnell/libstorage-bgl-eval,openSUSE/libstorage-bgl-eval,openSUSE/libstorage-bgl-eval,aschnell/libstorage-bgl-eval