Implement data interface on top of 0-db

[rkhamis]

Issue migrated from [https://api.github.com/repos/zero-os/0-robot/issues/264](), opened by @zaibon

We want to be able to store all the services data inside 0-db To do so we need to implement the zdb interface in all the different component that are currently saved on disk:

• service info: https://github.com/zero-os/0-robot/blob/9ddc74354276e30dea4378e5a81814ce63f2120a/zerorobot/template/base.py#L177-L183
• service data: https://github.com/zero-os/0-robot/blob/9ddc74354276e30dea4378e5a81814ce63f2120a/zerorobot/template/data.py#L44-L50
• service state: https://github.com/zero-os/0-robot/blob/9ddc74354276e30dea4378e5a81814ce63f2120a/zerorobot/template/state.py#L106-L112
• service task_list: https://github.com/zero-os/0-robot/blob/master/zerorobot/task/storage/base.py