update testing gems to try fixing occasional integration test error

Gemfile

@@ -78,10 +78,9 @@ group :test do
   gem 'rspec-rails'
   gem 'factory_girl_rails', '~> 4.0'
   gem 'faker'
-  # version requirements to avoid problem http://stackoverflow.com/questions/18114544
-  gem 'capybara', '~> 2.1.0'
+  gem 'capybara'
   # webkit and poltergeist don't seem to work yet
-  gem 'selenium-webdriver', '~> 2.35.1'
+  gem 'selenium-webdriver'
   gem 'database_cleaner'
   gem 'simplecov', require: false
   # need to include rspec components before i18n-spec or rake fails in test environment

Gemfile.lock

@@ -251,7 +251,7 @@ GEM
       rspec-mocks (~> 2.14.0)
     ruby-prof (0.13.0)
     ruby-rc4 (0.1.5)
-    rubyzip (0.9.9)
+    rubyzip (1.0.0)
     sass (3.2.12)
     sass-rails (3.2.6)
       railties (~> 3.2.0)
@@ -259,10 +259,10 @@ GEM
       tilt (~> 1.3)
     select2-rails (3.5.0)
       thor (~> 0.14)
-    selenium-webdriver (2.35.1)
+    selenium-webdriver (2.37.0)
       childprocess (>= 0.2.5)
       multi_json (~> 1.0)
-      rubyzip (< 1.0.0)
+      rubyzip (~> 1.0.0)
       websocket (~> 1.0.4)
     simple-navigation (3.11.0)
       activesupport (>= 2.3.2)
@@ -308,9 +308,9 @@ GEM
       rails (>= 3.1)
       railties (>= 3.1)
     tzinfo (0.3.38)
-    uglifier (2.2.1)
+    uglifier (2.3.0)
       execjs (>= 0.3.0)
-      multi_json (~> 1.0, >= 1.0.2)
+      json (>= 1.8.0)
     uniform_notifier (1.3.0)
     vegas (0.1.11)
       rack (>= 1.0.0)
@@ -336,7 +336,7 @@ DEPENDENCIES
   bullet
   capistrano (= 2.13.5)
   capistrano-ext
-  capybara (~> 2.1.0)
+  capybara
   client_side_validations
   client_side_validations-simple_form
   coffee-rails (~> 3.2.1)
@@ -369,7 +369,7 @@ DEPENDENCIES
   ruby-prof
   sass-rails (~> 3.2.3)
   select2-rails
-  selenium-webdriver (~> 2.35.1)
+  selenium-webdriver
   simple-navigation
   simple-navigation-bootstrap
   simple_form