filebeat.yml: remove environment references
filebeat.yml: remove environment references

Remove references to Jenkins-node environment. Manager server is not a
jenkins node, only the control node is. Thus the environment variables
cannot be resolved and filebeat fails to start.

moio/sumaform,moio/sumaform,MalloZup/sumaform,MalloZup/sumaform,MalloZup/sumaform,MalloZup/sumaform,moio/sumaform