Rename to Gitlab::Serialize::Ci::Variables

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8088#note_20133176

app/models/ci/build.rb

@@ -10,7 +10,7 @@ module Ci
     has_many :deployments, as: :deployable
 
     serialize :options
-    serialize :yaml_variables, Gitlab::Serialize::YamlVariables
+    serialize :yaml_variables, Gitlab::Serialize::Ci::Variables
 
     validates :coverage, numericality: true, allow_blank: true
     validates_presence_of :ref

lib/gitlab/serialize/ci/variables.rb

@@ -0,0 +1,32 @@
+module Gitlab
+  module Serialize
+    module Ci
+      # This serializer could make sure our YAML variables' keys and values
+      # are always strings. This is more for legacy build data because
+      # from now on we convert them into strings before saving to database.
+      module Variables
+        extend self
+
+        def load(string)
+          return unless string
+
+          object = YAML.safe_load(string, [Symbol])
+
+          object.map(&Variables.method(:convert_key_value_to_string))
+        end
+
+        def dump(object)
+          YAML.dump(object)
+        end
+
+        private
+
+        def convert_key_value_to_string(variable)
+          variable[:key] = variable[:key].to_s
+          variable[:value] = variable[:value].to_s
+          variable
+        end
+      end
+    end
+  end
+end

lib/gitlab/serialize/yaml_variables.rb

@@ -1,31 +0,0 @@
-
-module Gitlab
-  module Serialize
-    # This serializer could make sure our YAML variables' keys and values
-    # are always strings. This is more for legacy build data because
-    # from now on we convert them into strings before saving to database.
-    module YamlVariables
-      extend self
-
-      def load(string)
-        return unless string
-
-        object = YAML.safe_load(string, [Symbol])
-
-        object.map(&YamlVariables.method(:convert_key_value_to_string))
-      end
-
-      def dump(object)
-        YAML.dump(object)
-      end
-
-      private
-
-      def convert_key_value_to_string(variable)
-        variable[:key] = variable[:key].to_s
-        variable[:value] = variable[:value].to_s
-        variable
-      end
-    end
-  end
-end

spec/lib/gitlab/serialize/ci/variables_spec.rb

@@ -1,6 +1,6 @@
 require 'spec_helper'
 
-describe Gitlab::Serialize::YamlVariables do
+describe Gitlab::Serialize::Ci::Variables do
   subject do
     described_class.load(described_class.dump(object))
   end