Rename testing environment variable

NEXTCLOUD_LOCAL_GROUP_USER_PASSWORD was not really telling what
kind of password we are setting. The new name makes it more clear
that the password is related to the AMPF feature.

.env.test.local.example

@@ -38,7 +38,7 @@ NEXTCLOUD_LOCAL_OPENPROJECT_REDIRECT_URI=https://nextcloud.local/index.php/apps/
 NEXTCLOUD_LOCAL_OAUTH_CLIENT_ACCESS_TOKEN=
 NEXTCLOUD_LOCAL_OAUTH_CLIENT_REFRESH_TOKEN=
 
-NEXTCLOUD_LOCAL_GROUP_USER_PASSWORD=
+NEXTCLOUD_LOCAL_AMPF_PASSWORD=
 
 # Sharepoint/OneDrive VCR credentials
 

modules/storages/spec/factories/storage_factory.rb

@@ -173,7 +173,7 @@ FactoryBot.define do
     trait :as_automatically_managed do
       automatic_management_enabled { true }
       username { "OpenProject" }
-      password { ENV.fetch("NEXTCLOUD_LOCAL_GROUP_USER_PASSWORD", "AMPF_PASSWORD_NOT_SET") }
+      password { ENV.fetch("NEXTCLOUD_LOCAL_AMPF_PASSWORD", "AMPF_PASSWORD_NOT_SET") }
     end
   end