Simplify writing default credentials in the cassettes

spec/spec_helper.rb

@@ -8,32 +8,34 @@
 
 require "manageiq/providers/autosde"
 
+def credentials_autosde_host
+  @credentials_autosde_host ||= "autosde-appliance-host"
+end
+
+def credentials_autosde_user
+  @credentials_autosde_user ||= "autosde"
+end
+
+def credentials_autosde_password
+  @credentials_autosde_password ||= "change_me"
+end
+
 VCR.configure do |config|
   config.ignore_hosts 'codeclimate.com' if ENV['CI']
   config.cassette_library_dir = File.join(ManageIQ::Providers::Autosde::Engine.root, 'spec/vcr_cassettes')
   config.default_cassette_options = {:record => :none, :allow_unused_http_interactions => true}
   config.hook_into :webmock
 
   defaults = {
-    "appliance_host"        => "autosde-appliance-host",
-    "site_manager_user"     => "autosde",
-    "site_manager_password" => "change_me"
+    "appliance_host"        => credentials_autosde_host,
+    "site_manager_user"     => credentials_autosde_user,
+    "site_manager_password" => credentials_autosde_password
   }
-  (Rails.application.credentials.autosde_defaults || defaults).each do |key, value|
+
+  # Sanitize the credentials when writing to the cassette to avoid leaking this information.
+  defaults.each do |key, value|
     config.define_cassette_placeholder(value) do
       Rails.application.credentials.dig(:autosde, key)
     end
   end
 end
-
-def credentials_autosde_host
-  @credentials_autosde_host ||= "autosde-appliance-host"
-end
-
-def credentials_autosde_user
-  @credentials_autosde_user ||= "autosde"
-end
-
-def credentials_autosde_password
-  @credentials_autosde_password ||= "change_me"
-end