Submit experiments/realizations omitting dependencies among chunks in a realization

[cofinoa]

Currently WRF4G submits realizations of an experiment making the chunks dependants of the previous chunks in a realization.

For some testing purposes it would be interesting submit realizations without those dependencies.

[cofinoa]

The temporary solution could be to add an option to the submit sub-command for rea and exp commands:

wrf4g rea <name> submit       [ --dbg ] [ --dry-run ] [ --priority=<value> ] [ --rerun ] [--nodeps] [ <first_ch> [ <last_ch> ] ]
...
Options:
...
    --rerun                Force to run although the realization has finished.
    --nodeps               Submit chunks with no dependency with previous chunk
...

[cofinoa]

The key points to re-code are:

• Chunk object on the core.py: https://github.com/SantanderMetGroup/WRF4G/blob/wrf4g-2.2.x/lib/python/wrf4g/core.py#L829-L841
• Move some lines in the wraper.py: https://github.com/SantanderMetGroup/WRF4G/blob/wrf4g-2.2.x/lib/python/wrf4g/wrapper.py#L638-L677

[jesusff]

I implemented a first version in the nodeps branch of my fork:
https://github.com/jesusff/WRF4G/tree/nodeps