Add support for setting page size in Ruby PrintOptions

Author: yvsvarma

rb/spec/unit/selenium/print_options_spec.rb renamed to rb/spec/unit/selenium/webdriver/common/print_options_spec.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Licensed to the Software Freedom Conservancy (SFC) under one
 # or more contributor license agreements.  See the NOTICE file
 # distributed with this work for additional information
@@ -15,8 +17,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
-# frozen_string_literal: true
-
+require File.expand_path('../spec_helper', __dir__)
 require 'selenium/webdriver/common/print_options'