some JuMP solvers are noisy even when configured to their most quiet level

[Krastanov]

Some of the external optimizers we use create a ton of junk console output. Consider using a redirection to quiet them up.

example solution:

function capture_stdout(f)
    # return f()
    stdout_orig = stdout
    flush(stdout)
    (rd, wr) = redirect_stdout()
    r = f()
    close(wr)
    redirect_stdout(stdout_orig)
    return r
end