server/gitea: Changed default database_user to system_user

To be equal to other server roles

playbooks/host_nvak.banananet.work.yml

@@ -6,6 +6,7 @@
     - role: server/gitea
       domain: git.banananet.work
       gitea_system_user: git
+      database_user: gitea
     # Banananet.work
     - role: server/static
       domain: banananet.work

roles/server/gitea/defaults/main.yml

@@ -16,7 +16,7 @@ gitea_binary_path: "{{ gitea_installation_directory }}/gitea"
 gitea_socket_path: "{{ user_directory }}/gitea.socket"
 gitea_configuration_path: "{{ gitea_custom_directory }}/app.ini"
 
-database_user: "gitea"
+database_user: "{{ gitea_system_user }}"
 # database_pass from mysql/database
 # database_name from mysql/database