skip linters for cron job

Change-Id: I0c3a24600d583f7472a5d9f4aa318db1e4a1ae0b
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/287542
Reviewed-by: Bobby Buten <bobby.buten@instructure.com>
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
QA-Review: Aaron Ogata <aogata@instructure.com>
Product-Review: Aaron Ogata <aogata@instructure.com>

Jenkinsfile

@@ -552,7 +552,7 @@ pipeline {
                   extendedStage('Linters')
                     .hooks([onNodeReleasing: lintersStage.tearDownNode()])
                     .nodeRequirements(label: 'canvas-docker', podTemplate: lintersStage.nodeRequirementsTemplate())
-                    .required(!configuration.isChangeMerged())
+                    .required(!configuration.isChangeMerged() && env.GERRIT_PATCHSET_REVISION != '0')
                     .execute {
                       def nestedStages = [:]
 

build/new-jenkins/linters/run-gergich-publish.sh

@@ -4,6 +4,6 @@ set -ex
 export GERGICH_REVIEW_LABEL="Lint-Review"
 gergich status
 
-if [[ "$GERGICH_PUBLISH" == "1" && "$GERRIT_PATCHSET_REVISION" != "0" ]]; then
+if [[ "$GERGICH_PUBLISH" == "1" ]]; then
   GERGICH_GIT_PATH=".." gergich publish
 fi