Merge pull request #12101 from owncloud/ldap_split_mapping

apps/user_ldap/ajax/clearMappings.php

apps/user_ldap/appinfo/app.php

apps/user_ldap/lib/access.php

apps/user_ldap/lib/connection.php

apps/user_ldap/lib/helper.php

apps/user_ldap/lib/mapping/abstractmapping.php

apps/user_ldap/lib/mapping/groupmapping.php

apps/user_ldap/lib/mapping/usermapping.php

apps/user_ldap/lib/proxy.php

apps/user_ldap/tests/helper.php

apps/user_ldap/tests/mapping/abstractmappingtest.php

apps/user_ldap/tests/mapping/groupmapping.php

apps/user_ldap/tests/mapping/usermapping.php

lib/private/db/connection.php

lib/public/idbconnection.php