Change branch for the telegraf build job

Change-Id: I8276d8c012c6db44fd439fbea61d348616a5ec9a
diff --git a/jenkins/client/job/debian/packages/extra.yml b/jenkins/client/job/debian/packages/extra.yml
index 1fdc6c5..383a2d3 100644
--- a/jenkins/client/job/debian/packages/extra.yml
+++ b/jenkins/client/job/debian/packages/extra.yml
@@ -148,11 +148,11 @@
             - package: telegraf
               dist: trusty
               build: telegraf
-              branch: release-1.2
+              branch: release-1.5
             - package: telegraf
               dist: xenial
               build: telegraf
-              branch: release-1.2
+              branch: release-1.5
             - package: libvirt-exporter
               dist: xenial
               build: libvirt-exporter