Signed-off-by: pacoxu <paco.xu@daocloud.io>

add ut test for volume scope and no specified name create
Signed-off-by: Paco Xu <paco.xu@daocloud.io>

try to fix ut failure of volume creation
Signed-off-by: Paco Xu <paco.xu@daocloud.io>

try to fix ut failure of volume creation
Signed-off-by: Paco Xu <paco.xu@daocloud.io>

Scope is added in volume after docker 1.12
Signed-off-by: pacoxu <paco.xu@daocloud.io>

Scope is added in volume after docker 1.12
Signed-off-by: pacoxu <paco.xu@daocloud.io>