Add unit test for List() of pkg/storage/driver/memory.go
Add unit test for List() of pkg/storage/driver/memory.go

Signed-off-by: Dao Cong Tien <1c4ce126680ad816eec0a59ffe5c2a98ccd36526@vn.fujitsu.com>

michelleN/deployment-manager,helm/helm,adamreese/helm,helm/helm,adamreese/helm,michelleN/deployment-manager,michelleN/deployment-manager,michelleN/deployment-manager,adamreese/deployment-manager,bacongobbler/helm,adamreese/deployment-manager,adamreese/deployment-manager,adamreese/deployment-manager,adamreese/deployment-manager,bacongobbler/helm