Fix branch for jmx-exporter

Change-Id: Ic81281d99f6dbd9db3610f60a6b5b01f8b379500
diff --git a/jenkins/client/job/debian/packages/extra.yml b/jenkins/client/job/debian/packages/extra.yml
index 093b23d..c779cfe 100644
--- a/jenkins/client/job/debian/packages/extra.yml
+++ b/jenkins/client/job/debian/packages/extra.yml
@@ -156,7 +156,7 @@
             - package: jmx-exporter
               dist: xenial
               build: jmx-exporter
-              branch: debian/xenial
+              branch: master
           template:
             type: workflow-scm
             concurrent: false