Fix keepalived priority check

priority can be the same on different nodes, so don't fail the
test.

Change-Id: Ib6be8929b88fba533c71da43382e870a3795dae6
diff --git a/tcp_tests/managers/common_services_manager.py b/tcp_tests/managers/common_services_manager.py
index c62114d..4e1e34a 100644
--- a/tcp_tests/managers/common_services_manager.py
+++ b/tcp_tests/managers/common_services_manager.py
@@ -177,6 +177,7 @@
                             'keepalived:cluster:instance',
                             message)
 
+                    # keepalived 'priority' can be the same on multiple nodes
                     if any([priority == prio
                             for node, prio in vips[address]['nodes'].items()]):
                         message = (
@@ -188,10 +189,7 @@
                                                address,
                                                vips[address]['nodes'].keys())
                         )
-                        raise exceptions.SaltPillarError(
-                            minion_id,
-                            'keepalived:cluster:instance',
-                            message)
+                        LOG.warning("On {0}, {1}".format(minion_id, message))
 
                     # Add data to the vips
                     vips[address]['nodes'][minion_id] = priority