Expose the response headers

In order to access headers in a browser, we need to expose them as per
CORS protocol.

Fix the spec name

.travis.yml

@@ -1,7 +1,7 @@
 bundler_args: --without assets:development:production
 language: ruby
 rvm:
-  - 2.1.1
+  - 2.1.2
 addons:
   postgresql: "9.3"
 before_script:

config/application.rb

@@ -44,7 +44,7 @@ class Application < Rails::Application
     config.middleware.use Rack::Cors do
       allow do
         origins '*'
-        resource %r{/locations|organizations|search/*}, headers: :any, methods: [:get, :put, :patch, :post, :delete]
+        resource %r{/locations|organizations|search/*}, headers: :any, methods: [:get, :put, :patch, :post, :delete], expose: ['Link', 'X-Total-Count']
       end
     end
   end

spec/api/cors_spec.rb

@@ -33,7 +33,7 @@
     end
 
     it 'returns an empty Access-Control-Expose-Headers header' do
-      expect(headers['Access-Control-Expose-Headers']).to eq('')
+      expect(headers['Access-Control-Expose-Headers']).to eq('Link, X-Total-Count')
     end
 
     it 'allows access to the locations endpoint' do
@@ -127,8 +127,8 @@
       expect(headers['Access-Control-Allow-Credentials']).to eq('true')
     end
 
-    it 'returns an empty Access-Control-Expose-Headers header' do
-      expect(headers['Access-Control-Expose-Headers']).to eq('')
+    it 'exposes the Link and X-Total-Count headers' do
+      expect(headers['Access-Control-Expose-Headers']).to eq('Link, X-Total-Count')
     end
   end