Revise test_new with obs_id as query param
Revise test_new with obs_id as query param

rather than route param:
```ruby
GET   sequences/new?obs_id=<nnnnnn> #new
POST sequencees?obs_id=<nnnnnn> #new
```
rather than
```ruby
 new_sequence GET    /sequences/new(.:format)      sequences#new
              POST   /sequences(/:id)(.:format)    sequences#create {:id=>/\d+/}
```

MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer,MushroomObserver/mushroom-observer