Hubertus van Dam authored Aug 28, 2018 and Brad King committed Aug 30, 2018

By adding the "if (NOT BLAS_LIBRARIES)" statement to the Intel MKL
detection code block we have unintentionally turned Intel MKL from
the most preferred into the least preferred BLAS library. To fix
this issue the Intel MKL detection code block needs to be moved
forward to make it the first explicit BLAS library we test for.
This is change does just that and re-instates Intel MKL as the
most preferred explicit BLAS library.