Allow impersonating by default

dspace/config/dspace.cfg

@@ -942,7 +942,7 @@ registry.metadata.load = metashare-schema.xml
 # can login as another user from the "edit eperson" page. This is useful for
 # debugging problems in a running dspace instance, especially in the workflow
 # process. The default value is false, i.e. no one may assume the login of another user.
-#webui.user.assumelogin = true
+webui.user.assumelogin = true
 
 # whether to display the contents of the licence bundle (often just the deposit
 # licence in standard DSpace installation)