ZOOKEEPER-3896: Remove badly behaving PollSCM trigger
ZOOKEEPER-3896: Remove badly behaving PollSCM trigger

PollSCM trigger triggers a build every time it scans the ZooKeeper repo regardless the branch pointer has been changed or not. Instead, I try to use the built-in 'Scan Multibranch Pipeline' instead which should be good for the same purpose.

Author: Andor Molnar <andor@apache.org>

Reviewers: Enrico Olivelli <07e410ee8dc2e6e114c721434b1411e048f4444b@apache.org>

Closes #1415 from anmolnar/ZOOKEEPER-3896

(cherry picked from commit 1c41e127537f66842515ccb21fb48f1670003454)
Signed-off-by: Enrico Olivelli <07e410ee8dc2e6e114c721434b1411e048f4444b@apache.org>

naver/arcus-zookeeper,naver/arcus-zookeeper,naver/arcus-zookeeper,naver/arcus-zookeeper,naver/arcus-zookeeper,naver/arcus-zookeeper,naver/arcus-zookeeper,naver/arcus-zookeeper