[tx-robot] updated from transifex

apps/files/l10n/el.php

apps/files/l10n/ru_RU.php

apps/files_external/l10n/ru_RU.php

apps/files_sharing/l10n/ru_RU.php

apps/files_trashbin/l10n/ru_RU.php

apps/user_ldap/l10n/de_DE.php

core/l10n/ar.php

core/l10n/bg_BG.php

core/l10n/bn_BD.php

core/l10n/ca.php

core/l10n/cs_CZ.php

core/l10n/cy_GB.php

core/l10n/da.php

core/l10n/de.php

core/l10n/de_DE.php

core/l10n/el.php

core/l10n/eo.php

core/l10n/es.php

core/l10n/es_AR.php

core/l10n/et_EE.php