ipalib: split off client-side plugin code into ipaclient

Provide client-side overrides for command plugins which implement any of
the client-side `interactive_prompt_callback`, `forward` or
`output_for_cli` methods and move the methods from the original plugins to
the overrides.

https://fedorahosted.org/freeipa/ticket/4739

Reviewed-By: David Kupka <dkupka@redhat.com>

ipaclient/plugins/certprofile.py

@@ -0,0 +1,28 @@
+#
+# Copyright (C) 2015  FreeIPA Contributors see COPYING for license
+#
+
+from ipaclient.frontend import MethodOverride
+from ipalib import util
+from ipalib.plugable import Registry
+from ipalib.text import _
+
+register = Registry()
+
+
+@register(override=True)
+class certprofile_show(MethodOverride):
+    def forward(self, *keys, **options):
+        if 'out' in options:
+            util.check_writable_file(options['out'])
+
+        result = super(certprofile_show, self).forward(*keys, **options)
+        if 'out' in options and 'config' in result['result']:
+            with open(options['out'], 'wb') as f:
+                f.write(result['result'].pop('config'))
+            result['summary'] = (
+                _("Profile configuration stored in file '%(file)s'")
+                % dict(file=options['out'])
+            )
+
+        return result