Remove hidden group from test database.

Change-Id: Ia2123291c75103f32efc931299f4c1e82df72ea1
diff --git a/Changes b/Changes
index a621898..3893aa6 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,7 @@
 
 - Add institution & landingPage to the resource web-service (#777)
 - Make URL mandatory for plugin registration (#573)
+- Remove hidden group from test database
 
 # version 0.75