TileSimAlgs: Fix merging Tile E1 and MBTS cells (ATLASSIM-6580)

Tile Hit vector to container tool has been updated to fix merging hits
corresponding to some E1 and MBTS cells (which are really merged in used geometry).

Firstly, old hits are removed using the corresponding collection iterators
and only then new ones (merged) are added to the collection if it is needed,
since addition of new hits to the same collection can invalidate the iterators.