Merge pull request #3823 from rroa/bugfix/do_regions_filters

[DigitalOcean]  Added filtering capabilities to regions request.

CONTRIBUTORS.md

@@ -894,3 +894,4 @@
 * Ørjan Blom <blom@blom.tv>
 * Обоев Рулон ибн Хаттаб <me@nomadrain.com>
 * 应俊 <yj2317916@gmail.com>
+* Raul Roa <raulroa@playfulcorp.com>

lib/fog/digitalocean/models/compute_v2/regions.rb

@@ -12,7 +12,7 @@ module Fog
         # @raise [Fog::Compute::DigitalOceanV2::ServiceError]
         # @see https://developers.digitalocean.com/documentation/v2/#list-all-regions
         def all(filters = {})
-          data = service.list_regions.body["regions"]
+          data = service.list_regions(filters).body["regions"]
           load(data)
         end
       end

lib/fog/digitalocean/requests/compute_v2/list_regions.rb

@@ -2,18 +2,18 @@ module Fog
   module Compute
     class DigitalOceanV2
       class Real
-        def list_regions
+        def list_regions(filters = {})
           request(
             :expects => [200],
             :method  => 'GET',
-            :path    => '/v2/regions'
+            :path    => "/v2/regions?#{filters.to_a.map { |x| "#{x[0]}=#{x[1]}" }.join("&")}"
           )
         end
       end
 
       # noinspection RubyStringKeysInHashInspection
       class Mock
-        def list_regions
+        def list_regions(filters = {})
           response        = Excon::Response.new
           response.status = 200
           response.body   = {