moves Sms model to Verification namespace

spec/models/sms_spec.rb

@@ -1,14 +1,14 @@
 require 'rails_helper'
 
-describe Sms do
+describe Verification::Sms do
   it "should be valid" do
-    sms = build(:sms)
+    sms = build(:verification_sms)
     expect(sms).to be_valid
   end
 
   it "should validate uniqness of phone" do
     user = create(:user, confirmed_phone: "699999999")
-    sms = Sms.new(phone: "699999999")
+    sms = Verification::Sms.new(phone: "699999999")
     expect(sms).to_not be_valid
   end