test_permission_plugin: Fix permission_find test for legacy permissions

Most of the legacy permissions have been removed.
Do not test that there are many of them.

Reviewed-By: Martin Kosek <mkosek@redhat.com>

ipatests/test_xmlrpc/test_permission_plugin.py

@@ -2851,9 +2851,9 @@ class test_permission_legacy(Declarative):
             command=('permission_find', [],
                      {'ipapermlocation': api.env.basedn}),
             expected=dict(
-                count=lambda n: n > 50,
+                count=15,
                 truncated=False,
-                summary=lambda s: True,
+                summary=u'15 permissions matched',
                 result=lambda s: True,
             ),
         ),