This will allow to simplify checking for autonomous algorithm types

This is a specific type for algorithm using loop as they have
additional constraints with regards to classic autonomous
algorithms.

This allows for python2 and python3 support and is required
since we are currently providing a python2.7 environment.

This is handled on an upper layer.

This method is called from unpack which should return the object
loaded. Before the result was none.

Now both invalid case are treated as exception:
- Calling a loop using algorithm without loop_channel
- Calling a non loop using alggorithm with a loop_channel

Now the configuration includes both the "loop using" algorithm info
and the loop itself info.

The tuple should contain a:
- boolean for success or failure
- dictionary with the data to return to the algorithm

The format is:

"loop": {
    "input": {
        "type": "data_format_name"
    },
    "output": {
        "type": "data_format_name"
    }
}

The format is:

"loop": {
    "input": {
        "type": "data_format_name"
    },
    "output": {
        "type": "data_format_name"
    }
}

- loop is the validation algorithm
- loop_user is the algorithm communicating with the loop