Use nil Logger for tests
Use nil Logger for tests

Makes tests much more quietly, as opposed to the enormous amount of
logging that appears right now. This setting is used in AJ, as well as
other frameworks.

Output from test run:

```

.........................................................

Finished in 3.003355s, 18.9788 runs/s, 45.2827 assertions/s.
57 runs, 136 assertions, 0 failures, 0 errors, 0 skips
```

starknx/rails,bogdanvlviv/rails,joonyou/rails,illacceptanything/illacceptanything,eileencodes/rails,felipecvo/rails,kirs/rails-1,eileencodes/rails,gfvcastro/rails,jeremy/rails,jeremy/rails,deraru/rails,pvalena/rails,brchristian/rails,kamipo/rails,EmmaB/rails-1,palkan/rails,Edouard-chin/rails,shioyama/rails,alecspopa/rails,yhirano55/rails,flanger001/rails,rails/rails,georgeclaghorn/rails,assain/rails,alecspopa/rails,printercu/rails,rafaelfranca/omg-rails,repinel/rails,flanger001/rails,georgeclaghorn/rails,illacceptanything/illacceptanything,gauravtiwari/rails,tgxworld/rails,travisofthenorth/rails,esparta/rails,starknx/rails,shioyama/rails,aditya-kapoor/rails,Vasfed/rails,tjschuck/rails,notapatch/rails,Sen-Zhang/rails,printercu/rails,schuetzm/rails,illacceptanything/illacceptanything,deraru/rails,georgeclaghorn/rails,illacceptanything/illacceptanything,Vasfed/rails,untidy-hair/rails,betesh/rails,kmcphillips/rails,kddeisz/rails,mechanicles/rails,iainbeeston/rails,printercu/rails,vipulnsward/rails,Envek/rails,yahonda/rails,Erol/rails,Edouard-chin/rails,yalab/rails,Envek/rails,Sen-Zhang/rails,mohitnatoo/rails,assain/rails,baerjam/rails,vipulnsward/rails,Erol/rails,repinel/rails,tgxworld/rails,utilum/rails,illacceptanything/illacceptanything,baerjam/rails,notapatch/rails,deraru/rails,gfvcastro/rails,EmmaB/rails-1,Edouard-chin/rails,shioyama/rails,kamipo/rails,shioyama/rails,gcourtemanche/rails,yhirano55/rails,kmcphillips/rails,baerjam/rails,vipulnsward/rails,Stellenticket/rails,Stellenticket/rails,yasslab/railsguides.jp,eileencodes/rails,iainbeeston/rails,gfvcastro/rails,tjschuck/rails,utilum/rails,bogdanvlviv/rails,repinel/rails,kirs/rails-1,jeremy/rails,odedniv/rails,mechanicles/rails,prathamesh-sonpatki/rails,utilum/rails,utilum/rails,gauravtiwari/rails,iainbeeston/rails,Erol/rails,BlakeWilliams/rails,Vasfed/rails,tjschuck/rails,joonyou/rails,tjschuck/rails,MSP-Greg/rails,BlakeWilliams/rails,esparta/rails,yhirano55/rails,Envek/rails,lcreid/rails,assain/rails,mechanicles/rails,Erol/rails,deraru/rails,odedniv/rails,yawboakye/rails,schuetzm/rails,brchristian/rails,untidy-hair/rails,EmmaB/rails-1,yalab/rails,schuetzm/rails,Sen-Zhang/rails,aditya-kapoor/rails,BlakeWilliams/rails,esparta/rails,kmcphillips/rails,gfvcastro/rails,mohitnatoo/rails,joonyou/rails,lcreid/rails,BlakeWilliams/rails,yahonda/rails,betesh/rails,MSP-Greg/rails,kirs/rails-1,palkan/rails,yalab/rails,Edouard-chin/rails,alecspopa/rails,rafaelfranca/omg-rails,untidy-hair/rails,yawboakye/rails,betesh/rails,kmayer/rails,flanger001/rails,lcreid/rails,notapatch/rails,kddeisz/rails,betesh/rails,yhirano55/rails,aditya-kapoor/rails,prathamesh-sonpatki/rails,illacceptanything/illacceptanything,printercu/rails,yasslab/railsguides.jp,repinel/rails,Envek/rails,illacceptanything/illacceptanything,pvalena/rails,prathamesh-sonpatki/rails,illacceptanything/illacceptanything,gauravtiwari/rails,baerjam/rails,yasslab/railsguides.jp,travisofthenorth/rails,fabianoleittes/rails,mechanicles/rails,palkan/rails,MSP-Greg/rails,georgeclaghorn/rails,untidy-hair/rails,palkan/rails,kddeisz/rails,Stellenticket/rails,brchristian/rails,travisofthenorth/rails,notapatch/rails,pvalena/rails,gcourtemanche/rails,gcourtemanche/rails,illacceptanything/illacceptanything,arunagw/rails,arunagw/rails,flanger001/rails,yahonda/rails,fabianoleittes/rails,joonyou/rails,kmayer/rails,arunagw/rails,vipulnsward/rails,illacceptanything/illacceptanything,starknx/rails,Vasfed/rails,kmayer/rails,eileencodes/rails,prathamesh-sonpatki/rails,yalab/rails,jeremy/rails,illacceptanything/illacceptanything,yahonda/rails,travisofthenorth/rails,rails/rails,fabianoleittes/rails,illacceptanything/illacceptanything,yasslab/railsguides.jp,rails/rails,aditya-kapoor/rails,illacceptanything/illacceptanything,mohitnatoo/rails,illacceptanything/illacceptanything,rails/rails,illacceptanything/illacceptanything,arunagw/rails,lcreid/rails,kmcphillips/rails,odedniv/rails,schuetzm/rails,fabianoleittes/rails,Stellenticket/rails,iainbeeston/rails,MSP-Greg/rails,felipecvo/rails,yawboakye/rails,kddeisz/rails,kamipo/rails,felipecvo/rails,bogdanvlviv/rails,tgxworld/rails,pvalena/rails,mohitnatoo/rails,rafaelfranca/omg-rails,yawboakye/rails,tgxworld/rails,assain/rails,esparta/rails,bogdanvlviv/rails