Revert "Elm_Interface_Scrollable: Improvement in looping behavior"

Revert "Elm_Interface_Scrollable: Improvement in looping behavior"

Summary:
This reverts commit bba4c217f2ce4f032fca6298cc8b2fc6ff3d7c19.

"x and y position variable assumes values ranging from min to max " is right.
but in looping behavior, x and y are able to have value bigger than max or smaller than min.

@fix

Test Plan:
1. elementary_test -> scroller
           2. on Loop in X axis
           3. scrolling page to left.
           4. page is moved last page directly.

Reviewers: SanghyeonLee, tanwar.umesh07, raster, cedric, jaehwan, Hermet

Reviewed By: Hermet

Differential Revision: https://phab.enlightenment.org/D2977