improve mntr regex to match user specific keys. (#7533)
improve mntr regex to match user specific keys. (#7533)

* improve mntr regex to match user specific keys.

* Update plugins/inputs/zookeeper/zookeeper.go

Co-authored-by: Sven Rebhan <ee052b2cbed227ebaa0e87ef2d7a168c2e718f18@users.noreply.github.com>

Co-authored-by: guoxu <79c55ba9b1a32dc90bfc3e3dc7b8a43453bc7b18@chinatelecom.cn>
Co-authored-by: Sven Rebhan <ee052b2cbed227ebaa0e87ef2d7a168c2e718f18@users.noreply.github.com>
(cherry picked from commit 5c4c0e1494f8f10bc7f783bd7f56ab2f1228831a)

Brightspace/telegraf,Brightspace/telegraf,Brightspace/telegraf