"ceph osd create" is not idempotent
it is not without the "id" and "uuid" parameter.
but since it's considered deprecated. this tick is just for the record, in hope that people can reach here by searching using the keyword.
/a/kchai-2017-10-31_13:59:11-rados-wip-kefu-testing-2017-10-31-1919-distro-basic-mira/1796062 failed because the ceph cli injected a socket failure while reading from monitor, so the monitor received a RESET from its client when sending the reply of "ceph osd create" command. that's why the client sends 3 "ceph osd create" commands in a row with "CEPH_CLI_TEST_DUP_COMMAND" set.
that's why the returned osd id is 6 not 5.
probably we should always pass the uuid parameter in the test to avoid this problem.