Automatically retry running Vader tests so Travis CI will fail less
Automatically retry running Vader tests so Travis CI will fail less

neersighted/ale,IngoHeimbach/ale,IngoHeimbach/ale,neersighted/ale,neersighted/ale,w0rp/ale,IngoHeimbach/ale,hernot/ale,hernot/ale,hernot/ale,w0rp/ale,w0rp/ale