Continuing the clean up in account and container
info, removed duplicated validation from account_info
and container_info methods, since the same validations
were recently added to get_account_info and get_container_info.
Change-Id: I1ad745fe809367d22649c83f38c4de7a74cac44e
Signed-off-by: Thiago da Silva <thiago@redhat.com>