GitLab

Fix issues for distributed runs:
* fix config for memory bandwidth benchmarks
* add throttling for high concurrency docker pull
* update rsync path and exclude directories
* handle exceptions when creating summary
* tune for logging

Fetch benchmarks results on all nodes, will rsync after each benchmark.
The results directory structure on control node is as follows:

```
outputs/
└── datetime
    ├── nodes
    │   └── node-0
    │       ├── benchmarks
    │       │   ├── benchmark-0
    │       │   │   ├── rank-0
    │       │   │   │   └── results.json
    │       └── sb-exec.log
    ├── sb-run.log
    └── sb.config.yaml
```