FIX heisenfailure in test_lasso_lars_path_length

Tentative fix for #3370: random failure under Python 32 bit and
Windows.
Merge pull request #3629 from ogrisel/fix-unstable-lars-test

[MRG+1] FIX heisenfailure in test_lasso_lars_path_length
ENH upload Windows wheels to rackspace
Disable SSL cert check for CI upload under Windows
Path to the correct dist folder