Page element id attributes now have "uls-" prefix

Fixes failing Selenium tests.

Also:
- updated Ruby to version 2.1.2,
- updated all Ruby gems.

Paired with: Kartik Mistry

Change-Id: I1c614cb77f0760d6a84310ce602b0934f07445de

tests/browser/features/support/modules/interlanguage_module.rb

@@ -13,7 +13,7 @@ module InterlanguagePageModule
   a(:hindi_link, title: "Hindi")
   div(:input_settings, id: "input-settings-block")
   div(:language_list, class: "row uls-language-list lcd")
-  text_field(:language_search, id: "languagefilter")
+  text_field(:language_search, id: "uls-languagefilter")
   button(:non_default_language, class: "button uls-language-button", index: 1)
   a(:talk, text: "Discussion")
   span(:x, id: "languagesettings-close")

tests/browser/features/support/pages/ime_page.rb

@@ -10,7 +10,7 @@ class IMEPage
 	h3(:input_method_ime_list_title, class: "ime-list-title")
 	ul(:input_method_language_list, class: "ime-language-list")
 	div(:input_method_selector_menu, class: "imeselector-menu")
-	text_field(:language_filter, id: "languagefilter")
+	text_field(:language_filter, id: "uls-languagefilter")
 	li(:malayalam_inscript2, data_ime_inputmethod: "ml-inscript2")
 	a(:more_languages, class: "ime-selector-more-languages")
 	text_field(:search_input, id: "searchInput")