Move CapybaraHelpers to its own support file

In case we end up wanting to use it in Spinach as well.

spec/support/capybara.rb

@@ -19,36 +19,3 @@ unless ENV['CI'] || ENV['CI_SERVER']
   # Keep only the screenshots generated from the last failing test suite
   Capybara::Screenshot.prune_strategy = :keep_last_run
 end
-
-module CapybaraHelpers
-  # Execute a block a certain number of times before considering it a failure
-  #
-  # The given block is called, and if it raises a `Capybara::ExpectationNotMet`
-  # error, we wait `interval` seconds and then try again, until `retries` is
-  # met.
-  #
-  # This allows for better handling of timing-sensitive expectations in a
-  # sketchy CI environment, for example.
-  #
-  # interval - Delay between retries in seconds (default: 0.5)
-  # retries  - Number of times to execute before failing (default: 5)
-  def allowing_for_delay(interval: 0.5, retries: 5)
-    tries = 0
-
-    begin
-      yield
-    rescue Capybara::ExpectationNotMet => ex
-      if tries <= retries
-        tries += 1
-        sleep interval
-        retry
-      else
-        raise ex
-      end
-    end
-  end
-end
-
-RSpec.configure do |config|
-  config.include CapybaraHelpers, type: :feature
-end

spec/support/capybara_helpers.rb

+module CapybaraHelpers
+  # Execute a block a certain number of times before considering it a failure
+  #
+  # The given block is called, and if it raises a `Capybara::ExpectationNotMet`
+  # error, we wait `interval` seconds and then try again, until `retries` is
+  # met.
+  #
+  # This allows for better handling of timing-sensitive expectations in a
+  # sketchy CI environment, for example.
+  #
+  # interval - Delay between retries in seconds (default: 0.5)
+  # retries  - Number of times to execute before failing (default: 5)
+  def allowing_for_delay(interval: 0.5, retries: 5)
+    tries = 0
+
+    begin
+      yield
+    rescue Capybara::ExpectationNotMet => ex
+      if tries <= retries
+        tries += 1
+        sleep interval
+        retry
+      else
+        raise ex
+      end
+    end
+  end
+end
+
+RSpec.configure do |config|
+  config.include CapybaraHelpers, type: :feature
+end