wait_for_clean() can miss the new pool if it races with pool create.
Fixes: http://tracker.ceph.com/issues/20465
Signed-off-by: David Zafman <dzafman@redhat.com>
/bin/bash is a Linuxism. Other operating systems install bash to
different paths. Use /usr/bin/env in shebangs to find bash.
Signed-off-by: Alan Somers <asomers@gmail.com>