travis-ci: Moved SIGN expansion from env into test.
travis-ci: Moved SIGN expansion from env into test.

Fewer runs at the cost of making each run marginally longer.
Nice trade-off :)

madsbk/bohrium,bh107/bohrium,madsbk/bohrium,bh107/bohrium,bh107/bohrium,madsbk/bohrium,madsbk/bohrium,bh107/bohrium