`ruby2_keywords` for `method_missing`
`ruby2_keywords` for `method_missing`

This fixes the following warnings:

```
/rails/railties/lib/rails/railtie.rb:190: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
/rails/railties/lib/rails/application.rb:222: warning: The called method `config_for' is defined here
```

joonyou/rails,BlakeWilliams/rails,yawboakye/rails,kmcphillips/rails,fabianoleittes/rails,EmmaB/rails-1,Edouard-chin/rails,palkan/rails,eileencodes/rails,iainbeeston/rails,Envek/rails,tjschuck/rails,rails/rails,iainbeeston/rails,esparta/rails,lcreid/rails,jeremy/rails,mechanicles/rails,eileencodes/rails,yalab/rails,rafaelfranca/omg-rails,tgxworld/rails,schuetzm/rails,yawboakye/rails,starknx/rails,kddeisz/rails,Envek/rails,bogdanvlviv/rails,MSP-Greg/rails,yalab/rails,yahonda/rails,tgxworld/rails,yahonda/rails,jeremy/rails,kmcphillips/rails,kmcphillips/rails,Stellenticket/rails,rails/rails,Edouard-chin/rails,schuetzm/rails,EmmaB/rails-1,palkan/rails,Stellenticket/rails,yawboakye/rails,tjschuck/rails,vipulnsward/rails,esparta/rails,Vasfed/rails,bogdanvlviv/rails,vipulnsward/rails,jeremy/rails,starknx/rails,rails/rails,Erol/rails,lcreid/rails,iainbeeston/rails,repinel/rails,mechanicles/rails,MSP-Greg/rails,tgxworld/rails,tgxworld/rails,tjschuck/rails,gauravtiwari/rails,fabianoleittes/rails,schuetzm/rails,starknx/rails,BlakeWilliams/rails,mechanicles/rails,Envek/rails,Erol/rails,palkan/rails,georgeclaghorn/rails,prathamesh-sonpatki/rails,Edouard-chin/rails,yahonda/rails,georgeclaghorn/rails,MSP-Greg/rails,iainbeeston/rails,Envek/rails,Stellenticket/rails,esparta/rails,kmcphillips/rails,schuetzm/rails,bogdanvlviv/rails,mechanicles/rails,Vasfed/rails,MSP-Greg/rails,repinel/rails,tjschuck/rails,joonyou/rails,Vasfed/rails,yhirano55/rails,esparta/rails,yawboakye/rails,yhirano55/rails,betesh/rails,fabianoleittes/rails,yalab/rails,kddeisz/rails,georgeclaghorn/rails,Erol/rails,kddeisz/rails,palkan/rails,kddeisz/rails,betesh/rails,gauravtiwari/rails,Stellenticket/rails,lcreid/rails,repinel/rails,prathamesh-sonpatki/rails,vipulnsward/rails,rafaelfranca/omg-rails,gauravtiwari/rails,yahonda/rails,bogdanvlviv/rails,Edouard-chin/rails,lcreid/rails,EmmaB/rails-1,BlakeWilliams/rails,prathamesh-sonpatki/rails,joonyou/rails,fabianoleittes/rails,prathamesh-sonpatki/rails,jeremy/rails,rafaelfranca/omg-rails,Vasfed/rails,vipulnsward/rails,betesh/rails,Erol/rails,yhirano55/rails,rails/rails,joonyou/rails,repinel/rails,betesh/rails,eileencodes/rails,georgeclaghorn/rails,eileencodes/rails,BlakeWilliams/rails,yhirano55/rails,yalab/rails