Jenkins: Add debmirror formula: packaging and testing

PROD-17356

Change-Id: I4bd1d34691dc9f750b8dd700a258f0f4f19308ff
diff --git a/jenkins/client/job/salt-formulas/tests.yml b/jenkins/client/job/salt-formulas/tests.yml
index d8f21ce..b6d74f2 100644
--- a/jenkins/client/job/salt-formulas/tests.yml
+++ b/jenkins/client/job/salt-formulas/tests.yml
@@ -29,6 +29,7 @@
             - name: cinder
             - name: collectd
             - name: designate
+            - name: debmirror
             - name: dekapod
             - name: devops-portal
             - name: docker