Left and right margins removal is not enough larger

To remove bad pixels on left and right sides of GRD images, S1Tiling use the a reset margins operations

The size of the area to be reset is 1000 pixels. This value is hard coded in otbwrappers/s1_to_s2.py

On some locations and orbits, this value is not enough and the image borders are not cleaned.

Ex: tile 31TFL , orbit 139

I suggest to set this value (1000) to a parameter keys in the config files. Default value can be set to 1050