Variable name consistence

This could be more consistent:

    kimai_dbname: "{% if vhost.value.kimai_dbname is defined %}{{ vhost.value.kimai_dbname }}{% else %}{{ user.value.users_mariadb_databases[0] }}{% endif %}"
    kimai_dbuser: "{{ vhost.value.kimai_dbuser | default(user.key) }}"
    kimai_dbpass: "{{ users_mariadb_password_read.stdout | trim | quote }}"
    kimai_dbprefix: "{{ vhost.value.kimai_dbprefix | default('') }}"

    nextcloud_dbname: "{% if vhost.value.nextcloud_dbname is defined %}{{ vhost.value.nextcloud_dbname }}{% else %}{{ user.value.users_mariadb_databases[0] }}{% endif %}"
    nextcloud_dbuser: "{{ vhost.value.nextcloud_dbuser | default(user.key) }}"
    nextcloud_dbpass: "{{ users_mariadb_password_read.stdout | trim | quote }}"
    nextcloud_dbprefix: "{{ vhost.value.nextcloud_dbprefix | default('') }}"

    matomo_db_username: "{{ user.key }}"
    matomo_db_pass: "{{ users_mariadb_password_read.stdout | trim | quote }}"
    matomo_db_host: localhost
    matomo_dbname: "{% if vhost.value.matomo_dbname is defined %}{{ vhost.value.matomo_dbname }}{% else %}{{ user.value.users_mariadb_databases[0] }}{% endif %}"

    phpmyadmin_db: "{% if vhost.value.phpmyadmin_db is defined %}{{ vhost.value.phpmyadmin_db }}{% else %}{{ user.value.users_mariadb_databases[0] }}{% endif %}"
    phpmyadmin_db_user: "{{ user.key }}"
    phpmyadmin_db_pass: "{{ users_mariadb_password_read.stdout | trim | quote }}"
    phpmyadmin_db_socket: /var/run/mysqld/mysqld.sock
    phpmyadmin_db_host: localhost
    phpmyadmin_db_port: 3306