Merge branch 'feature/latms' into 'master'

Add xlatms matrix generator

This PR:
   - Adds the lapack xlatms matrix generators that allows to specify the eigen/singular values of the generated matrix
   - Add a CORE_xlatm1 vector generator converted from the Lapack version to generate vector of specific eigen/singular values. The prototype may evolve to be called in a parallel generation of the vector.
   - Factorize the random number generator to avoid code duplication and reuse in xlatm1

See merge request !226