Rollback to deprecated "logrotate" JJB option

sre-ci dislikes new parameter

Change-Id: I124e1b125343b02f167f9ea6b768e6b5f9492847
diff --git a/jobs/templates/cleanup-jenkins-agents.yml b/jobs/templates/cleanup-jenkins-agents.yml
index 46039b5..3fa97b4 100644
--- a/jobs/templates/cleanup-jenkins-agents.yml
+++ b/jobs/templates/cleanup-jenkins-agents.yml
@@ -14,6 +14,6 @@
           - master
           url: https://gerrit.mcp.mirantis.com/mcp/tcp-qa
       script-path: jobs/pipelines/remove-old-jenkins-agents.groovy
-    build-discarder:
-      days-to-keep: 365
-      artifact-days-to-keep: 60
\ No newline at end of file
+    logrotate:
+      DaysToKeep: 365
+      artifactDaysToKeep: 60
\ No newline at end of file