Add jobs for powerdns salt formulas CI

the following jobs are added:
  * for packages building
  * sync with github
  * run tests against of salt-forumula-powerdns

Change-Id: I3d21c234cc2017ef89dbadde2ba9772d999c246e
diff --git a/jenkins/client/job/salt-formulas/tests.yml b/jenkins/client/job/salt-formulas/tests.yml
index 68792d4..d8aa88d 100644
--- a/jenkins/client/job/salt-formulas/tests.yml
+++ b/jenkins/client/job/salt-formulas/tests.yml
@@ -86,6 +86,7 @@
             - name: owncloud
             - name: postfix
             - name: postgresql
+            - name: powerdns
             - name: pritunl
             - name: prometheus
             - name: python