organization of XML files and synchronization with code
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from ICOSAGCM/xml [DYNAMICO dynamical core]
- context_input_dynamico.xml
- field_def_dynamico.xml

from ICOSA_LMDZ/xml [INTERFACE]
- iodef.xml

from LMDZ.GENERIC/deftank [LMDZ physics]
- field_def_physics.xml
- context_lmdz_physics.xml

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to be created and adapted from ICOSAGCM/xml
>> check compatibility when changing ICOSAGCM version 
- context_dynamico.xml

to be created and adapted from ICOSAGCM test cases
>> check compatibility when changing ICOSAGCM version
- file_def_dynamico.xml