Remove deprecated and unused parameters to concat::fragment

The warnings are as follows:

Warning: Scope(Concat::Fragment[pg_hba_rule_deny access to postgresql user]): The $mode parameter to concat::fragment is deprecated and has no effect
Warning: Scope(Concat::Fragment[pg_hba_rule_deny access to postgresql user]): The $owner parameter to concat::fragment is deprecated and has no effect
Merge pull request #311 from kronn/patch-1

Remove deprecated and unused parameters to concat::fragment