This reverts commit d25245e8.

This fix do not solve the issue with ignored and infinite values that affect all band of an image. This is why matrix type are used instead of vector for computation, in order to provide generic solution if number of sample per band is different.

This getter provide the ability to get the number of pixel with non infinity and not ignored values of an image.

ENH: Renaming new methods to SetNthParmeterStringList() and AddParameterStringList() following discussion on otb-developers

Conflicts:
	SuperBuild/CMake/External_libsvm.cmake

Merge branch 'mvd-november-sprint' of https://git.orfeo-toolbox.org/git/otb into mvd-november-sprint