(maint) Define :config in token tests

Miscellaneous whitespace cleanup.

spec/vmpooler/api/v1/token_spec.rb

@@ -25,6 +25,7 @@ describe Vmpooler::API::V1 do
   describe '/token' do
     let(:prefix) { '/api/v1' }
     let(:current_time) { Time.now }
+    let(:config) { { } }
 
     before do
       app.settings.set :config, config

spec/vmpooler/api/v1/vm_hostname_spec.rb

@@ -51,7 +51,6 @@ describe Vmpooler::API::V1 do
     end
 
     describe 'PUT /vm/:hostname' do
-
       it 'allows tags to be set' do
         create_vm('testhost')
         put "#{prefix}/vm/testhost", '{"tags":{"tested_by":"rspec"}}'