Replace `Eddies_region_4` with new run

We need to update this input directory because of the change of DBF
field `date_index` to `days_1950`.

Overlap/Tests/Input/Region_4/Eddies_region_4/grid_nml.txt

-&grid_nml CORNER_deg  = 16.12500       , -38.87500      ,
- NLON    = 20,
- NLAT    = 20
-/
+&GRID_NML
+ CORNER_DEG=  16.1250000    , -38.8750000    ,
+ STEP_DEG= 2*0.250000000     ,
+ NLON=20         ,
+ NLAT=20         ,
+ /

Overlap/Tests/Input/Region_4/Eddies_region_4/ishape_last.txt

-4
-10
+           6
+13

Overlap/Tests/Input/Region_4/Eddies_region_4/used_nml.txt

+&MAIN_NML
+ MIN_AMP=  1.00000005E-03,
+ MAX_RADIUS= 2*20         ,
+ MIN_RADIUS=  25.0000000    ,
+ /