Also, fix a bunch of quirky journal_tool invocations that pass
"--rank" argument as the command argument rather than passing it
as function argument.
Fixes: https://tracker.ceph.com/issues/24780
Signed-off-by: Venky Shankar <vshankar@redhat.com>
This was sending lots of metadata ops to MDSs to persuade
them to migrate some subtrees, but that was flaky. Use
the shiny new rank pinning functionality instead.
Signed-off-by: John Spray <john.spray@redhat.com>
