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Ifpack2::OverlappingRowMatrix::apply: Fix #4392

James Willenbring requested to merge mhoemmen:Fix-4392-2 into develop

Created by: mhoemmen


Fix #4392 (closed) by rewriting Ifpack2::OverlappingRowMatrix::apply to call Tpetra::CrsMatrix::apply directly for the two CrsMatrix objects in OverlappingRowMatrix, instead of rerolling CrsMatrix::apply in a slow and sequential way. Fix potential issues with Tpetra::MultiVector's offset view constructor that came up as a result of this fix. This may also address #4353 (closed).

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