Field declaration order and field construction order should match as ambiguity
may arise: it's always the field declarations order that matter. The other one
is ignored.

This commit is meant to silence gcc `-Wreorder` warning.

```
../Modules/Filtering/ImageManipulation/include/otbGridResampleImageFilter.hxx:44:5: warning: field 'm_CheckOutputBounds' will be initialized after field 'm_InterpolationMargin' [-Wreorder]

```