Improve handling of dimension definition settings

Today the dimensions fit are saved in the .ows It allows to display them when loading the .ows. Furthermore use can provide a different tolerance for different axis and fine tune the dimension fitting:

But when the .ows file is processed from CLI we end up with two limitations:

• if the dimensions are saved then raw values will be picked. Regardless to the dataset. (so the dataset used to build the original .ows and the dataset processed from the CLI must have the same dimension position). If user want to recompute the dimensions he will need to define the 'dims' parameter to 'MISSING_DATA'.
• if the dimensions are not defined then users will not be able to fine tune the dimension.

As of today there is no perfect solution. One 'simple' solution could be to avoid storing dims in the .ows.