Do not refer to a machine-specific directory

We can make a symbolic link or copy to `$large_input_dir`.

Inst_eddies/Tests/long_tests.json

@@ -91,7 +91,7 @@
         "command":
 	[
             "$build_dir/Inst_eddies/inst_eddies_Aviso.py",
-	    "/proju/lmd-oce/EUREC4A_OA/DATA_SAT_New/SSH_CLS/EUREC4A_CMEMS_NRT/dataset-duacs-global-allsat-phy-2020-01-31.nc",
+	    "$large_input_dir/dataset-duacs-global-allsat-phy-2020-01-31.nc",
 	    "--template=dataset-duacs-global-allsat-phy-%Y-%m-%d.nc", "-l",
 	    "20200202"
         ],