Roughness multi input

[AliceHarang]

• : Add the possibility to use multiple roughness files
• : Add Test for the multiple roughness files use
• : Add Test for the multiple bathy files
• : Update the automatic testing

Complementary:

• : Add value input for IL/CL
• : Add test for this value input

[AliceHarang]

After creating the test, I observe a weird behavior when the value is 0 (for bathy and roughness).

[CyprienBosserelle]

Would be neat to fix this one as well:
#105

[AliceHarang]

I have also finished to add the possibility to have a Continuous Loss and Initial Loss as a constant.

[CyprienBosserelle]

I had a quick look again and the way the "NaN" values are removed is the most appropriate way.
There is now a built -in mechanism to remove NAN from input/forcing maps but in the case of vector of map we only want to remove the value from the top map and leave large hole in the data intact for the other maps.

[CyprienBosserelle]

if the test succeed please go ahead and merge.
C

[CyprienBosserelle]

All good