test: fix test cases after schema type namespace change

apps/emqx_auth/test/emqx_authn/emqx_authn_schema_SUITE.erl

@@ -54,7 +54,7 @@ t_check_schema(_Config) ->
     ?assertThrow(
         #{
             path := "authentication.1.password_hash_algorithm.name",
-            matched_type := "authn:builtin_db/authn-hash:simple",
+            matched_type := "authn:builtin_db/authn_hash:simple",
             reason := unable_to_convert_to_enum_symbol
         },
         Check(ConfigNotOk)

apps/emqx_retainer/test/emqx_retainer_SUITE.erl

@@ -555,7 +555,7 @@ t_page_read(_) ->
     ok = emqtt:disconnect(C1).
 
 t_only_for_coverage(_) ->
-    ?assertEqual("retainer", emqx_retainer_schema:namespace()),
+    ?assertEqual(retainer, emqx_retainer_schema:namespace()),
     ignored = gen_server:call(emqx_retainer, unexpected),
     ok = gen_server:cast(emqx_retainer, unexpected),
     unexpected = erlang:send(erlang:whereis(emqx_retainer), unexpected),