Make env and plugins commands local again

During thin client refactoring, LocalOrRemote class implementation of `run`
method was overriden by default Command implementation during instantiation of
client plugins from schema. This caused these commands to always forward this
request to IPA master.

This patch restores the original behavior: unless `--server` option was
specified, the commands will always print out local config.

https://fedorahosted.org/freeipa/ticket/6490

Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>

ipaclient/plugins/misc.py

@@ -2,14 +2,15 @@
 # Copyright (C) 2016  FreeIPA Contributors see COPYING for license
 #
 
-from ipaclient.frontend import CommandOverride
+from ipalib.misc import env as _env
+from ipalib.misc import plugins as _plugins
 from ipalib.plugable import Registry
 
 register = Registry()
 
 
 @register(override=True, no_fail=True)
-class env(CommandOverride):
+class env(_env):
     def output_for_cli(self, textui, output, *args, **options):
         output = dict(output)
         output.pop('count', None)
@@ -20,7 +21,7 @@ class env(CommandOverride):
 
 
 @register(override=True, no_fail=True)
-class plugins(CommandOverride):
+class plugins(_plugins):
     def output_for_cli(self, textui, output, *args, **options):
         options['all'] = True
         return super(plugins, self).output_for_cli(textui, output,