2). The general OPEN-MP in the OFFLINE driver is removed

Given:

• the lack of efficiency of the general OPEN-MP in OFFLINE mode, compared to the MPI effect,
• the difficulty to maintain OPEN-MP into the SURFEX code (notably concerning I/O routines),

we remove it from the OFFLINE code.

=> It will not be possible any longer to test the OPEN-MP for AROME, in the OFFLINE mode. It would be good to get the specific OFFLINE driver from Yann Seity to test the OPEN-MP.

There is now some OPEN-MP in the PGD and PREP steps.

It’s better not to put any OPEN-MP in the temporal loop of the model, because OPEN-MP is used in arome outside the call to COUPLING_SURF_ATM.