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/debian/packages/salt.yml b/jenkins/client/job/debian/packages/salt.yml
index 0e5ab64..ac2ca8f 100644
--- a/jenkins/client/job/debian/packages/salt.yml
+++ b/jenkins/client/job/debian/packages/salt.yml
@@ -149,6 +149,8 @@
               dist: trusty
             - name: postgresql
               dist: trusty
+            - name: powerdns
+              dist: trusty
             - name: pritunl
               dist: trusty
             - name: prometheus
@@ -345,6 +347,8 @@
               dist: xenial
             - name: prometheus
               dist: xenial
+            - name: powerdns
+              dist: xenial
             - name: python
               dist: xenial
             - name: rabbitmq