exclude upgrade node from minions

Change-Id: I1e31a77db00245fd82798f6b3e8f330a833f7a2e
diff --git a/openstack-control-upgrade.groovy b/openstack-control-upgrade.groovy
index 0e30598..f6b3f6a 100644
--- a/openstack-control-upgrade.groovy
+++ b/openstack-control-upgrade.groovy
@@ -246,7 +246,7 @@
                 node_count++
             }
             def control_general_target = ""
-            def control_target_hosts = salt.getMinions(pepperEnv, 'I@keystone:server')
+            def control_target_hosts = salt.getMinions(pepperEnv, 'I@keystone:server and not upg*')
             node_count = 1
 
             for (t in control_target_hosts) {