Add posibility to set slave agent port

Related-PROD: https://mirantis.jira.com/browse/PROD-21891

Change-Id: Id61042e2f197a1bfb70dc693452584938d2cc118
diff --git a/tests/pillar/master.sls b/tests/pillar/master.sls
index ded11aa..ffbc039 100644
--- a/tests/pillar/master.sls
+++ b/tests/pillar/master.sls
@@ -3,6 +3,7 @@
     enabled: true
     mode: EXCLUSIVE
     no_config: false
+    slave_agent_port: 54906
     slaves:
       - name: slave01
         label: pbuilder