MatvecAllocator: Allocates and populates input to the matrix-vector...
In RHPCBenchmark: Benchmarks for High-Performance Computing Environments

MatvecAllocator allocates and populates the input to the matrix-vector multiplication dense matrix kernel for the purposes of conducting a single performance trial with the MatvecMicrobenchmark function. The matrices or vectors corresponding to the index parameter must be allocated, initialized and returned in the kernelParameters list.

1	MatvecAllocator(benchmarkParameters, index)

`benchmarkParameters`	an object of type `DenseMatrixMicrobenchmark` specifying various parameters needed to generate input for the dense matrix kernel.
`index`	an integer index indicating the dimensions of the matrix or vector data to be generated as input for the dense matrix kernel.