server_controller & template_controller to rails.new

57 specs. one valid failure.

tests seem flaky. fail with error:
```
Double FlashMessageService received unexpected message :add with (#<Java::ComThoughtworksGoPresentation::FlashMessageModel:0x4bf22762>)
```
some other tests fail for same reason upstream when run together but pass individually. needs to be looked at.

server_controller moved from controllers/config to controllers/admin. routes moved accordingly. views will be moved to correct place.