Fix default value of kube_api_server_endpoint (#5529)

Signed-off-by: Arthur Outhenin-Chalandre <arthur@cri.epita.fr>

roles/kubespray-defaults/defaults/main.yaml

@@ -450,8 +450,8 @@ loadbalancer_apiserver_type: "nginx"
 # applied if only external loadbalancer_apiserver is defined, otherwise ignored
 apiserver_loadbalancer_domain_name: "lb-apiserver.kubernetes.local"
 kube_apiserver_endpoint: |-
-  {% if loadbalancer_apiserver is defined and loadbalancer_apiserver.port is defined -%}
-       https://{{ apiserver_loadbalancer_domain_name|default('lb-apiserver.kubernetes.local') }}:{{ loadbalancer_apiserver.port|default(kube_apiserver_port) }}
+  {% if loadbalancer_apiserver is defined -%}
+       https://{{ apiserver_loadbalancer_domain_name }}:{{ loadbalancer_apiserver.port|default(kube_apiserver_port) }}
   {%- elif not is_kube_master and loadbalancer_apiserver_localhost -%}
        https://localhost:{{ loadbalancer_apiserver_port|default(kube_apiserver_port) }}
   {%- elif is_kube_master -%}