fix: variables hostname telegraf/influx

roles/cobald/tasks/influxdb.yml

@@ -2,8 +2,8 @@
   docker_container:
     name: ed-influxdb
     image: docker.io/library/influxdb:2.0
-    hostname: "{{influx_hostname}}"
-    domainname: "{{influx_domainname}}"
+    hostname: "{{cobald_influx_hostname}}"
+    domainname: "{{cobald_domainname}}"
     networks:
     - name: "{{ cobald_docker_network }}"
     networks_cli_compatible: True