Use new fixed stub for pre-2019.2.19 deployments of jenkins

Change-Id: I91ebcf0e64c1348a34c4c3fb06f66244a11ff1f4
diff --git a/jobs/pipelines/swarm-create-cfg-config-drive.groovy b/jobs/pipelines/swarm-create-cfg-config-drive.groovy
index 2d82832..c55005f 100644
--- a/jobs/pipelines/swarm-create-cfg-config-drive.groovy
+++ b/jobs/pipelines/swarm-create-cfg-config-drive.groovy
@@ -209,7 +209,7 @@
 apt:
   sources:
     jenkins-formula:
-      source: deb http://mirror.seed01-bud.infra.mirantis.net/mcp/review/130026/salt-formulas/xenial xenial main
+      source: deb [trusted=yes] http://srv08-srt.infra.mirantis.net:8080/salt-formula-jenkins-2019.2.19/ xenial main
 
 merge_how: "dict(recurse_array)+list(append)"
 """