Fixed skip messages to match pillars

Change-Id: I5bdbaf7a2c6d59f68a37cb2213b8c31f64e742d3
diff --git a/cvp_checks/tests/test_galera_cluster.py b/cvp_checks/tests/test_galera_cluster.py
index 5a74bdd..676f09b 100644
--- a/cvp_checks/tests/test_galera_cluster.py
+++ b/cvp_checks/tests/test_galera_cluster.py
@@ -9,7 +9,8 @@
         expr_form='pillar')
 
     if not gs:
-        pytest.skip("Galera is not found on this environment")
+        pytest.skip("Galera service or galera:* pillar \
+        are not found on this environment.")
 
     size_cluster = []
     amount = len(gs)