Show migrations when running truffle test

[robertzk]

It was very difficult to debug some issues with tests on a private network that did not display migrations being run implicitly. I recommend setting quiet: false here so the user sees an informative display of migrations that are executed during testing.

Running migration: 1_initial_migration.js
  Replacing Migrations...
  ... 0x3d8d5d32ef0375d3c0ec50dd86adc8ce0c2288aa013ff1751ecccfb774a9f7f1

Note that neither --quiet=false or --quiet=0 work, as config.with overrides the value (and the former gives config.quiet === "false" rather than config.quiet == false anyway).