Implement ELBV2 remove_tags endpoint

lib/fog/aws/elbv2.rb

@@ -8,6 +8,7 @@ module Fog
       request :add_tags
       request :create_load_balancer
       request :describe_tags
+      request :remove_tags
       request :describe_load_balancers
       request :describe_listeners
 

lib/fog/aws/requests/elbv2/remove_tags.rb

@@ -0,0 +1,45 @@
+module Fog
+  module AWS
+    class ELBV2
+      class Real
+        require 'fog/aws/parsers/elbv2/empty'
+
+        # removes tags from an elastic load balancer instance
+        # http://docs.aws.amazon.com/ElasticLoadBalancing/latest/APIReference/API_RemoveTags.html
+        # ==== Parameters
+        # * resource_arn <~String> - ARN of the ELB instance whose tags are to be retrieved
+        # * keys <~Array> A list of String keys for the tags to remove
+        # ==== Returns
+        # * response<~Excon::Response>:
+        #   * body<~Hash>:
+        def remove_tags(resource_arn, keys)
+          request(
+            { 'Action'                      => 'RemoveTags',
+              'ResourceArns.member.1'  => resource_arn,
+              :parser => Fog::Parsers::AWS::ELBV2::Empty.new,
+            }.merge(Fog::AWS.indexed_param('TagKeys.member.%d', keys))
+          )
+        end
+
+      end
+
+      class Mock
+
+        def remove_tags(resource_arn, keys)
+          response = Excon::Response.new
+          if self.data[:load_balancers_v2][resource_arn]
+            keys.each {|key| self.data[:tags][resource_arn].delete key}
+            response.status = 200
+            response.body = {
+              "ResponseMetadata"=>{ "RequestId"=> Fog::AWS::Mock.request_id }
+            }
+            response
+          else
+            raise Fog::AWS::ELBV2::NotFound.new("Elastic load balancer #{resource_arn} not found")
+          end
+        end
+
+      end
+    end
+  end
+end