For Update process, switch repositories to update/proposed

Change-Id: I9ed3e2975bac989d116da5f005456c0446648373
diff --git a/tcp_tests/tests/system/test_mcp_update.py b/tcp_tests/tests/system/test_mcp_update.py
index f4688b7..4a1cfa2 100644
--- a/tcp_tests/tests/system/test_mcp_update.py
+++ b/tcp_tests/tests/system/test_mcp_update.py
@@ -61,6 +61,19 @@
         "release/proposed/2019.2.0",
         "cluster/*/infra/init.yml"
     )
+
+    proposed_branch = "http://mirror.mirantis.com/update/proposed/"
+    url_param = "parameters._param.linux_system_repo_update_url"
+    reclass_actions.add_key(url_param, proposed_branch,
+                            "cluster/*/infra/init.yml")
+    reclass_actions.add_key(url_param, proposed_branch,
+                            "cluster/*/openstack/init.yml")
+    reclass_actions.add_key(url_param, proposed_branch,
+                            "cluster/*/stacklight/init.yml")
+    reclass_actions.add_key(url_param, proposed_branch,
+                            "cluster/*/ceph/init.yml")
+
+    salt_actions.run_state("*", "saltutil.refresh_pillar")
     salt_actions.enforce_state("I@jenkins:client", "jenkins.client")
 
 
@@ -225,7 +238,7 @@
                              "cluster/*/infra/init.yml")
 
         show_step(4)
-        salt.enforce_state("dbs*", "saltutil.refresh_pillar")
+        salt.run_state("dbs*", "saltutil.refresh_pillar")
 
         # ############# Add repositories with new Galera packages #######
         show_step(5)