Drop 'mariadb' SR and 'duplicity' component/recipe

[duplicity] has at least 2 issues:
- use os.chdir
- creation of paths outside of location

setup.py

@@ -103,7 +103,6 @@ setup(name=name,
           'dropbear = slapos.recipe.dropbear:Recipe',
           'dropbear.add_authorized_key = slapos.recipe.dropbear:AddAuthorizedKey',
           'dropbear.client = slapos.recipe.dropbear:Client',
-          'duplicity = slapos.recipe.duplicity:Recipe',
           'equeue = slapos.recipe.equeue:Recipe',
           'erp5.promise = slapos.recipe.erp5_promise:Recipe',
           'erp5scalabilitytestbed = slapos.recipe.erp5scalabilitytestbed:Recipe',

slapos/recipe/duplicity.py

-##############################################################################
-#
-# Copyright (c) 2010 Vifib SARL and Contributors. All Rights Reserved.
-#
-# WARNING: This program as such is intended to be used by professional
-# programmers who take the whole responsibility of assessing all potential
-# consequences resulting from its eventual inadequacies and bugs
-# End users who are looking for a ready-to-use solution with commercial
-# guarantees and support are strongly adviced to contract a Free Software
-# Service Company
-#
-# This program is Free Software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 3
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-#
-##############################################################################
-from slapos.recipe.librecipe import GenericBaseRecipe
-
-class Recipe(GenericBaseRecipe):
-
-  def install(self):
-
-    remote_url = self.options['remote-backup']
-    backup_directory = self.options['local-directory']
-
-    cmd = [self.options['duplicity-binary'],]
-    options = ['--no-encryption', '--archive-dir', self.options['cache']]
-
-    if self.optionIsTrue('recover', False):
-      options.append('--force')
-      # duplicity [options] remote backup
-      cmd.extend(options)
-      cmd.extend([remote_url, backup_directory])
-    else:
-      # duplicity [options] local remote
-      cmd.extend(options)
-      cmd.extend([backup_directory, remote_url])
-
-    return self.createWrapper(self.options['wrapper'], cmd)