Update rails, rails-html-sanitizer, and nokogiri for security fixes

See https://dev.gitlab.org/gitlab/gitlabhq/issues/2643

Gemfile

 source "https://rubygems.org"
 
-gem 'rails', '4.2.5'
+gem 'rails', '4.2.5.1'
 gem 'rails-deprecated_sanitizer', '~> 1.0.3'
 
 # Responders respond_to and respond_with
@@ -103,7 +103,8 @@ gem 'asciidoctor',   '~> 1.5.2'
 gem 'rouge',         '~> 1.10.1'
 
 # See https://groups.google.com/forum/#!topic/ruby-security-ann/aSbgDiwb24s
-gem 'nokogiri', '1.6.7.1'
+# and https://groups.google.com/forum/#!topic/ruby-security-ann/Dy7YiKb_pMM
+gem 'nokogiri', '1.6.7.2'
 
 # Diffs
 gem 'diffy', '~> 3.0.3'

Gemfile.lock

@@ -4,41 +4,41 @@ GEM
     CFPropertyList (2.3.2)
     RedCloth (4.2.9)
     ace-rails-ap (2.0.1)
-    actionmailer (4.2.5)
-      actionpack (= 4.2.5)
-      actionview (= 4.2.5)
-      activejob (= 4.2.5)
+    actionmailer (4.2.5.1)
+      actionpack (= 4.2.5.1)
+      actionview (= 4.2.5.1)
+      activejob (= 4.2.5.1)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.5)
-      actionview (= 4.2.5)
-      activesupport (= 4.2.5)
+    actionpack (4.2.5.1)
+      actionview (= 4.2.5.1)
+      activesupport (= 4.2.5.1)
       rack (~> 1.6)
       rack-test (~> 0.6.2)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.5)
-      activesupport (= 4.2.5)
+    actionview (4.2.5.1)
+      activesupport (= 4.2.5.1)
       builder (~> 3.1)
       erubis (~> 2.7.0)
       rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activejob (4.2.5)
-      activesupport (= 4.2.5)
+    activejob (4.2.5.1)
+      activesupport (= 4.2.5.1)
       globalid (>= 0.3.0)
-    activemodel (4.2.5)
-      activesupport (= 4.2.5)
+    activemodel (4.2.5.1)
+      activesupport (= 4.2.5.1)
       builder (~> 3.1)
-    activerecord (4.2.5)
-      activemodel (= 4.2.5)
-      activesupport (= 4.2.5)
+    activerecord (4.2.5.1)
+      activemodel (= 4.2.5.1)
+      activesupport (= 4.2.5.1)
       arel (~> 6.0)
     activerecord-deprecated_finders (1.0.4)
     activerecord-session_store (0.1.2)
       actionpack (>= 4.0.0, < 5)
       activerecord (>= 4.0.0, < 5)
       railties (>= 4.0.0, < 5)
-    activesupport (4.2.5)
+    activesupport (4.2.5.1)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -482,7 +482,7 @@ GEM
       grape
       newrelic_rpm
     newrelic_rpm (3.9.4.245)
-    nokogiri (1.6.7.1)
+    nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
     nprogress-rails (0.1.6.7)
     oauth (0.4.7)
@@ -588,16 +588,16 @@ GEM
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.2.5)
-      actionmailer (= 4.2.5)
-      actionpack (= 4.2.5)
-      actionview (= 4.2.5)
-      activejob (= 4.2.5)
-      activemodel (= 4.2.5)
-      activerecord (= 4.2.5)
-      activesupport (= 4.2.5)
+    rails (4.2.5.1)
+      actionmailer (= 4.2.5.1)
+      actionpack (= 4.2.5.1)
+      actionview (= 4.2.5.1)
+      activejob (= 4.2.5.1)
+      activemodel (= 4.2.5.1)
+      activerecord (= 4.2.5.1)
+      activesupport (= 4.2.5.1)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.5)
+      railties (= 4.2.5.1)
       sprockets-rails
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
@@ -605,11 +605,11 @@ GEM
       activesupport (>= 4.2.0.beta, < 5.0)
       nokogiri (~> 1.6.0)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.2)
+    rails-html-sanitizer (1.0.3)
       loofah (~> 2.0)
-    railties (4.2.5)
-      actionpack (= 4.2.5)
-      activesupport (= 4.2.5)
+    railties (4.2.5.1)
+      actionpack (= 4.2.5.1)
+      activesupport (= 4.2.5.1)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (2.0.0)
@@ -962,7 +962,7 @@ DEPENDENCIES
   net-ssh (~> 3.0.1)
   newrelic-grape
   newrelic_rpm (~> 3.9.4.245)
-  nokogiri (= 1.6.7.1)
+  nokogiri (= 1.6.7.2)
   nprogress-rails (~> 0.1.6.7)
   oauth2 (~> 1.0.0)
   octokit (~> 3.7.0)
@@ -988,7 +988,7 @@ DEPENDENCIES
   rack-attack (~> 4.3.1)
   rack-cors (~> 0.4.0)
   rack-oauth2 (~> 1.2.1)
-  rails (= 4.2.5)
+  rails (= 4.2.5.1)
   rails-deprecated_sanitizer (~> 1.0.3)
   raphael-rails (~> 2.1.2)
   rblineprof