Renames confirmed_oauth_email to oauth_email

Refactors the way oauth_email is used to cover more cases (fixes pending specs)

db/migrate/20160126090634_rename_confirmed_oauth_email_to_oauth_email.rb

@@ -0,0 +1,5 @@
+class RenameConfirmedOauthEmailToOauthEmail < ActiveRecord::Migration
+  def change
+    rename_column :users, :confirmed_oauth_email, :oauth_email
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160125100637) do
+ActiveRecord::Schema.define(version: 20160126090634) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -398,7 +398,7 @@ ActiveRecord::Schema.define(version: 20160125100637) do
     t.integer  "notifications_count",                  default: 0
     t.string   "locale"
     t.boolean  "registering_with_oauth",               default: false
-    t.string   "confirmed_oauth_email"
+    t.string   "oauth_email"
   end
 
   add_index "users", ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true, using: :btree